perf(store): measure scoped-list allocation and avoid unnecessary artifact cloning

[DeliciousBuding]

Summary

Follow the real memory-read path identified in #2333/#2335 instead of changing SQLite's SQL pool. filterOrdered and listClonedArtifacts currently allocate result capacity from the entire resident order; listClonedArtifacts also clones content-source metadata before deciding whether a row matches the requested run. Validate the actual cost, including dense/unfiltered controls, before changing either behavior.

Scope / File Ownership

One local writer on a worktree from current origin/master:

• edge-server/internal/store/store_query_bench_test.go: repeatable real Store.ListRuns / Store.ListArtifacts benchmarks.
• edge-server/internal/store/store_query.go: narrowly measured allocation/clone changes only, if justified; no new indexes, pools or persistence state.
• edge-server/internal/store/store_query_test.go: reuse/extend existing selection, insertion-order and deep-copy ownership tests if needed.
• A temporary edge-server/internal/store/scoped_list_experiment_test.go may compare allocation strategies, but is not a permanent parallel implementation. Save its relevant evidence on this issue and remove it before the delivery commit.

Owner: docs/architecture/02-edge-server.md (regular reads delegate to the memory Store; no SQL readers or runtime/pool change).

Workload / Interfaces / Invariants

• Generated fixtures with 100 / 1,000 resident records. A sparse scope has ten records; the dense scope has the remaining records. Also measure a missing scope and the unfiltered empty scope.
• Invoke real Store facade methods, record per-call time/allocated bytes/allocation count, and validate complete ordered IDs before/after timing. Artifacts carry generated content-source metadata, not file contents read from a workspace.
• Preserve empty-scope semantics, non-nil empty results, insertion order, and detached returned artifact ContentSource values. Do not confuse nil-slice JSON behavior with an allocation improvement.
• Do not optimize sparse cases by silently regressing dense/all-record cases. Quantify candidate tradeoffs; a rejected experiment is an acceptable documented decision, not a reason to keep extra implementation code.

Acceptance

1. Baseline samples against current production code, including sparse/dense/missing/all controls and the observed clone allocations; no bottleneck claim based only on source inspection.
2. A production change only after a justified narrow improvement. Matching before/after measurement fixture, non-race runs, declared environment, repetitions and raw samples saved here.
3. Existing behavior/ownership tests plus any necessary new regression checks pass. Full store-package Linux race, Windows tests, vet/staticcheck and all required PR gates pass.
4. Remove temporary experimental implementations, retain only a useful reproducible benchmark and justified code change, sync affected documentation, then clean the merged worktree/branch.

Negative Constraints / Dependencies

No API/schema/SQL/pool/debounce changes, production data, deployment, user-workspace reads, new CI jobs, timing thresholds, RSS or production-throughput claims. #2256 is already closed for its original four candidates; this is a new measured follow-up, not a reopened duplicate backlog. EventLog #2304 and upstream vulnerability #1663 remain separate.

[DeliciousBuding]

Baseline: actual Store read facades

Source 90e06a9c1759d95517cddaedb92b00f114948bc8; production query code is unchanged from 4e3739e39402d1de7dec83c4f6f4be3609d181b9. 80 samples passed (16 cases × 5 repetitions). Full ordered IDs and non-nil empty slices are checked outside timing; counts are also checked in the loop.

Local Ubuntu 24.04 / WSL2, linux/amd64, Go 1.26.5, i7-14700HX, GOMAXPROCS=4. No SQL, network, JSON encoding or file content reads. Fixtures are created with Store APIs: 100/1,000 runs and artifact metadata records; ten belong to the sparse scope and the rest to the dense scope. These are declared synthetic resident sizes, not observed user rates.

From edge-server:

CGO_ENABLED=1 go test -p 2 ./internal/store -run '^$' \
  -bench '^BenchmarkStoreScopedLists$' \
  -benchtime=1s -count=5 -cpu=4 -benchmem -timeout=10m

Case	median us/call	min–max us/call	allocated B/call	allocs/call	results	capacity
resident=100/runs/missing	3.354	3.297–3.832	18432	1	0	100
resident=100/artifacts/missing	5.338	5.307–5.476	18368	101	0	100
resident=100/runs/sparse	3.904	3.578–3.959	18432	1	10	100
resident=100/artifacts/sparse	5.356	5.318–5.714	18368	101	10	100
resident=100/runs/dense	4.091	4.039–4.179	18432	1	90	100
resident=100/artifacts/dense	6.587	5.716–7.190	18368	101	90	100
resident=100/runs/all	4.194	4.101–4.240	18432	1	100	100
resident=100/artifacts/all	6.107	5.716–7.193	18368	101	100	100
resident=1000/runs/missing	37.655	36.093–37.809	172033	1	0	1000
resident=1000/artifacts/missing	63.472	62.572–64.032	179072	1001	0	1000
resident=1000/runs/sparse	42.135	40.669–49.275	172033	1	10	1000
resident=1000/artifacts/sparse	68.530	65.099–81.048	179072	1001	10	1000
resident=1000/runs/dense	48.154	42.722–51.011	172032	1	990	1000
resident=1000/artifacts/dense	67.312	66.084–69.076	179072	1001	990	1000
resident=1000/runs/all	41.954	41.357–43.081	172032	1	1000	1000
resident=1000/artifacts/all	66.386	65.299–67.197	179072	1001	1000	1000

The suspicion is confirmed at the declared scale: a ten-run result at 1,000 resident runs allocates about 172 KB/call; a zero-result artifact query still performs 1,001 allocations and allocates 179,072 B. Artifact content-source clones are performed even for rows that will be rejected. This is actual facade behavior, not an estimate from the loop source.

A separate temporary component experiment is evaluating capacity strategies with missing/sparse/dense/all controls; no strategy has been selected or applied to production yet. Numbers above are medians of repeated per-run means, not operation p50 or an end-to-end latency claim. B/op is allocation, not RSS/retained heap.

All 80 baseline samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	  397969	      3327 ns/op	       100.0 result-cap	         0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	  343141	      3716 ns/op	       100.0 result-cap	         0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	  303411	      3832 ns/op	       100.0 result-cap	         0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	  360758	      3297 ns/op	       100.0 result-cap	         0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	  379644	      3354 ns/op	       100.0 result-cap	         0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	  225682	      5307 ns/op	       100.0 result-cap	         0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	  218864	      5476 ns/op	       100.0 result-cap	         0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	  209206	      5311 ns/op	       100.0 result-cap	         0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	  209578	      5392 ns/op	       100.0 result-cap	         0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	  226239	      5338 ns/op	       100.0 result-cap	         0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  342333	      3589 ns/op	       100.0 result-cap	        10.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  325456	      3949 ns/op	       100.0 result-cap	        10.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  321573	      3959 ns/op	       100.0 result-cap	        10.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  293923	      3904 ns/op	       100.0 result-cap	        10.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  332270	      3578 ns/op	       100.0 result-cap	        10.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  216693	      5714 ns/op	       100.0 result-cap	        10.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  222894	      5538 ns/op	       100.0 result-cap	        10.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  228320	      5356 ns/op	       100.0 result-cap	        10.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  225906	      5318 ns/op	       100.0 result-cap	        10.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  213418	      5331 ns/op	       100.0 result-cap	        10.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  295005	      4179 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  286093	      4150 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  285154	      4039 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  301147	      4071 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  307328	      4091 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  204076	      5716 ns/op	       100.0 result-cap	        90.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  207373	      5762 ns/op	       100.0 result-cap	        90.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  203016	      6704 ns/op	       100.0 result-cap	        90.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  185464	      7190 ns/op	       100.0 result-cap	        90.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  179580	      6587 ns/op	       100.0 result-cap	        90.00 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  278232	      4194 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  275058	      4101 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  304293	      4161 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  293338	      4240 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  301994	      4205 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  210638	      6107 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  184555	      7193 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  159040	      6486 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  213747	      5740 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  202652	      5716 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   31119	     37755 ns/op	      1000 result-cap	         0 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   31518	     37809 ns/op	      1000 result-cap	         0 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   33194	     36093 ns/op	      1000 result-cap	         0 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   33541	     36714 ns/op	      1000 result-cap	         0 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   32583	     37655 ns/op	      1000 result-cap	         0 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	   18559	     63826 ns/op	      1000 result-cap	         0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	   18547	     63472 ns/op	      1000 result-cap	         0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	   19227	     62974 ns/op	      1000 result-cap	         0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	   19292	     62572 ns/op	      1000 result-cap	         0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	   18616	     64032 ns/op	      1000 result-cap	         0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   31564	     42135 ns/op	      1000 result-cap	        10.00 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   24613	     49275 ns/op	      1000 result-cap	        10.00 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   23086	     46601 ns/op	      1000 result-cap	        10.00 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   29902	     41492 ns/op	      1000 result-cap	        10.00 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   30126	     40669 ns/op	      1000 result-cap	        10.00 results/op	  172033 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   14727	     81048 ns/op	      1000 result-cap	        10.00 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   18474	     65099 ns/op	      1000 result-cap	        10.00 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   17902	     67426 ns/op	      1000 result-cap	        10.00 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   17368	     68530 ns/op	      1000 result-cap	        10.00 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   17690	     68978 ns/op	      1000 result-cap	        10.00 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   25747	     46472 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   25230	     48154 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   25828	     49007 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   23572	     51011 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   27076	     42722 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   18153	     66084 ns/op	      1000 result-cap	       990.0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   16872	     69076 ns/op	      1000 result-cap	       990.0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17838	     67312 ns/op	      1000 result-cap	       990.0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17431	     68525 ns/op	      1000 result-cap	       990.0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17875	     66545 ns/op	      1000 result-cap	       990.0 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   27486	     42994 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   28807	     41954 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   27669	     41902 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   25966	     43081 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   28682	     41357 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   18099	     66386 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   18123	     66592 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   18351	     65299 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   18068	     67197 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   18147	     65384 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
PASS
ok  	github.com/agenthub/edge-server/internal/store	96.628s

[DeliciousBuding]

Allocation strategy experiments: rejected alternatives and selected candidate

All three runs completed successfully on the same Linux/WSL2/Go 1.26.5 environment described in the facade baseline. 240 samples total, five repetitions per case. These temporary Run helper benchmarks do not take Store.RLock: compare alternatives within each run, not their absolute timings against facade measurements. The current helper for these runs is the unchanged production implementation at 90e06a9c1759d95517cddaedb92b00f114948bc8 (base production 4e3739e39402d1de7dec83c4f6f4be3609d181b9). The temporary file was extended between the three commands; the final source snapshot is below.

Decisions:

• Reject ordinary small-cap append growth: sparse allocation improves, but 1,000-row dense queries reach 578,560 B and eight allocations/call, with roughly 4x latency in that control.
• Reject count-first: rescans the map/predicate and regresses dense queries. Predicate invocation remains exactly once per ordered row.
• Reject heap-small-then-full: adds a second allocation and copying; dense controls regress.
• Lazy full capacity helps missing queries but leaves sparse result capacity proportional to all resident rows; it does not solve the demonstrated sparse-allocation cost.
• Select stack staging as a candidate, not yet a delivered claim: a fixed local 16-element buffer is copied into an exact-size result for small matches; on overflow the result allocates once at full capacity and finishes the remaining scan. Missing results remain non-nil with zero allocation. Dense/all controls retain one allocation and show no comparable regression in this component run. No new index, pool, persistence state, repeated predicate or runtime tuning is introduced.

The next gate is the real Store facade using the generic helper, including artifacts cloned only after selection; that result is pending. The staged artifact metadata is never exposed until deep-copy ownership is restored. The temporary parallel implementations will be removed from the delivery tree after archiving this evidence. Medians here are medians of repeated benchmark means, not per-operation p50, RSS or production throughput.

Single-pass allocation alternatives

Command from edge-server: CGO_ENABLED=1 go test -p 2 ./internal/store -run '^$' -bench '^BenchmarkScopedListStrategies$' -benchtime=500ms -count=5 -cpu=4 -benchmem -timeout=5m

Case	median us/call	allocated B/call	allocs/call
missing/current	32.735	172032	1
missing/lazy-full	12.391	0	0
missing/small-cap16	12.716	3072	1
missing/count-first	12.003	0	0
sparse/current	32.640	172032	1
sparse/lazy-full	35.471	172033	1
sparse/small-cap16	13.793	3072	1
sparse/count-first	25.639	1792	1
dense/current	44.028	172032	1
dense/lazy-full	42.932	172032	1
dense/small-cap16	176.772	578560	8
dense/count-first	59.062	172032	1
all/current	42.485	172032	1
all/lazy-full	42.001	172032	1
all/small-cap16	173.989	578560	8
all/count-first	54.194	172032	1

All 80 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkScopedListStrategies/missing/current-4         	   18368	     32665 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/current-4         	   18235	     32920 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/current-4         	   18391	     32708 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/current-4         	   18418	     32768 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/current-4         	   18246	     32735 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/lazy-full-4       	   49354	     12441 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/lazy-full-4       	   48669	     12391 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/lazy-full-4       	   49429	     12360 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/lazy-full-4       	   49196	     12245 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/lazy-full-4       	   46536	     12489 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/small-cap16-4     	   46084	     13022 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/small-cap16-4     	   45998	     12689 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/small-cap16-4     	   46233	     12716 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/small-cap16-4     	   47341	     12659 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/small-cap16-4     	   46017	     12859 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/missing/count-first-4     	   48199	     12003 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/count-first-4     	   50868	     11829 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/count-first-4     	   51858	     11938 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/count-first-4     	   50320	     12101 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/missing/count-first-4     	   49920	     12320 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListStrategies/sparse/current-4          	   18240	     32672 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/current-4          	   18492	     32414 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/current-4          	   18343	     32640 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/current-4          	   18412	     32578 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/current-4          	   18440	     33596 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/lazy-full-4        	   17010	     35234 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/lazy-full-4        	   16862	     35471 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/lazy-full-4        	   16951	     35394 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/lazy-full-4        	   16806	     35975 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/lazy-full-4        	   16876	     35687 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/small-cap16-4      	   44907	     13364 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/small-cap16-4      	   42420	     13793 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/small-cap16-4      	   42444	     13736 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/small-cap16-4      	   43351	     13800 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/small-cap16-4      	   43119	     13906 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/count-first-4      	   23048	     26032 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/count-first-4      	   23550	     25613 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/count-first-4      	   23410	     25639 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/count-first-4      	   23199	     25966 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListStrategies/sparse/count-first-4      	   23384	     25521 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/current-4           	   13904	     44304 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/current-4           	   13755	     44054 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/current-4           	   13555	     44028 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/current-4           	   13956	     42482 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/current-4           	   13762	     43287 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/lazy-full-4         	   14023	     42932 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/lazy-full-4         	   13984	     42316 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/lazy-full-4         	   14131	     43037 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/lazy-full-4         	   13904	     43212 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/lazy-full-4         	   13617	     42697 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/small-cap16-4       	    4214	    174375 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/dense/small-cap16-4       	    3385	    176772 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/dense/small-cap16-4       	    3624	    168424 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/dense/small-cap16-4       	    3100	    195134 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/dense/small-cap16-4       	    2762	    192179 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/dense/count-first-4       	    9798	     60393 ns/op	       990.0 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/count-first-4       	    9700	     60383 ns/op	       990.0 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/count-first-4       	   10000	     58916 ns/op	       990.0 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/count-first-4       	   10000	     57754 ns/op	       990.0 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/dense/count-first-4       	    9944	     59062 ns/op	       990.0 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/current-4             	   13722	     43706 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/current-4             	   14001	     42485 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/current-4             	   14860	     41641 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/current-4             	   14157	     41626 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/current-4             	   13980	     43014 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/lazy-full-4           	   14791	     40192 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/lazy-full-4           	   14400	     42226 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/lazy-full-4           	   14554	     41759 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/lazy-full-4           	   14137	     42180 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/lazy-full-4           	   14169	     42001 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/small-cap16-4         	    4195	    169726 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/all/small-cap16-4         	    3303	    170799 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/all/small-cap16-4         	    3576	    178850 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/all/small-cap16-4         	    3607	    178340 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/all/small-cap16-4         	    3273	    173989 ns/op	      1365 result-cap	  578560 B/op	       8 allocs/op
BenchmarkScopedListStrategies/all/count-first-4         	    9574	     53524 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/count-first-4         	   10000	     54453 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/count-first-4         	   10000	     55185 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/count-first-4         	   11007	     54194 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListStrategies/all/count-first-4         	   10000	     52973 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
PASS
ok  	github.com/agenthub/edge-server/internal/store	47.933s

Small heap buffer, then full-capacity growth

Command from edge-server: CGO_ENABLED=1 go test -p 2 ./internal/store -run '^$' -bench '^BenchmarkScopedListTwoStage$' -benchtime=500ms -count=5 -cpu=4 -benchmem -timeout=5m

Case	median us/call	allocated B/call	allocs/call
resident=100/missing/current	3.039	18432	1
resident=100/missing/small-then-full	0.994	0	0
resident=100/sparse/current	3.227	18432	1
resident=100/sparse/small-then-full	1.426	3072	1
resident=100/dense/current	3.791	18432	1
resident=100/dense/small-then-full	4.287	21504	2
resident=100/all/current	3.864	18432	1
resident=100/all/small-then-full	4.286	21504	2
resident=1000/missing/current	36.126	172033	1
resident=1000/missing/small-then-full	12.937	0	0
resident=1000/sparse/current	36.090	172033	1
resident=1000/sparse/small-then-full	13.658	3072	1
resident=1000/dense/current	43.402	172032	1
resident=1000/dense/small-then-full	53.783	175104	2
resident=1000/all/current	43.834	172032	1
resident=1000/all/small-then-full	53.549	175104	2

All 80 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  188720	      3039 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  209110	      3011 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  200637	      2982 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  203455	      3047 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  175086	      3158 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/small-then-full-4 	  617698	       991.7 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/small-then-full-4 	  621468	       986.9 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/small-then-full-4 	  621888	       993.6 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/small-then-full-4 	  626841	       996.3 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/small-then-full-4 	  620464	      1002 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  177622	      3189 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  177225	      3163 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  194512	      3251 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  179740	      3245 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  180762	      3227 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/small-then-full-4  	  402601	      1429 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/small-then-full-4  	  448129	      1419 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/small-then-full-4  	  426354	      1420 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/small-then-full-4  	  406048	      1426 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/small-then-full-4  	  403676	      1449 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  159219	      3830 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  152328	      3835 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  152067	      3721 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  158301	      3766 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  154172	      3791 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/small-then-full-4   	  138015	      4281 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/small-then-full-4   	  140644	      4408 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/small-then-full-4   	  144166	      4245 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/small-then-full-4   	  151752	      4287 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/small-then-full-4   	  131704	      4362 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  146824	      3823 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  157687	      3867 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  166336	      3864 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  155470	      3764 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  146235	      3885 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/small-then-full-4     	  138338	      4245 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/small-then-full-4     	  139366	      4361 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/small-then-full-4     	  135184	      4402 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/small-then-full-4     	  138926	      4286 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/small-then-full-4     	  136972	      4264 ns/op	       100.0 result-cap	   21504 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   16548	     35910 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17277	     35559 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   16524	     36126 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   16467	     37051 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   16306	     36653 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/small-then-full-4         	   45499	     12937 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/small-then-full-4         	   47252	     13017 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/small-then-full-4         	   46282	     13046 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/small-then-full-4         	   46676	     12800 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/small-then-full-4         	   46920	     12827 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4                  	   16917	     35843 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4                  	   16677	     36090 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4                  	   16537	     35865 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4                  	   15512	     38615 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4                  	   15595	     38508 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/small-then-full-4          	   42372	     14530 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/small-then-full-4          	   41257	     14596 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/small-then-full-4          	   44004	     13456 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/small-then-full-4          	   43884	     13658 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/small-then-full-4          	   43900	     13564 ns/op	        16.00 result-cap	    3072 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4                   	   14032	     43463 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4                   	   13542	     44045 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4                   	   14229	     41916 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4                   	   13695	     43402 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4                   	   14302	     42657 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/small-then-full-4           	   10000	     53783 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/small-then-full-4           	   10000	     51280 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/small-then-full-4           	   10000	     54606 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/small-then-full-4           	   10000	     53503 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/small-then-full-4           	   10000	     54270 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4                     	   13286	     44754 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4                     	   13987	     42652 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4                     	   14041	     43834 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4                     	   13592	     44294 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4                     	   14068	     42267 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/small-then-full-4             	   10000	     53549 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/small-then-full-4             	   11643	     52211 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/small-then-full-4             	   10000	     54300 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/small-then-full-4             	   10000	     52577 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/small-then-full-4             	   10000	     55472 ns/op	      1000 result-cap	  175104 B/op	       2 allocs/op
PASS
ok  	github.com/agenthub/edge-server/internal/store	47.433s

Stack staging, then one dense-result allocation

Command from edge-server: CGO_ENABLED=1 go test -p 2 ./internal/store -run '^$' -bench '^BenchmarkScopedListTwoStage$/././^(current|stack-small)$' -benchtime=500ms -count=5 -cpu=4 -benchmem -timeout=5m

Case	median us/call	allocated B/call	allocs/call
resident=100/missing/current	3.024	18432	1
resident=100/missing/stack-small	0.999	0	0
resident=100/sparse/current	3.284	18432	1
resident=100/sparse/stack-small	1.279	1792	1
resident=100/dense/current	3.901	18432	1
resident=100/dense/stack-small	3.873	18432	1
resident=100/all/current	3.803	18432	1
resident=100/all/stack-small	3.803	18432	1
resident=1000/missing/current	34.329	172033	1
resident=1000/missing/stack-small	12.615	0	0
resident=1000/sparse/current	35.759	172033	1
resident=1000/sparse/stack-small	13.247	1792	1
resident=1000/dense/current	42.089	172032	1
resident=1000/dense/stack-small	40.306	172032	1
resident=1000/all/current	40.591	172032	1
resident=1000/all/stack-small	39.826	172032	1

All 80 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  190672	      3044 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  207471	      3015 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  196544	      3019 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  201250	      3024 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/current-4         	  189820	      3042 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/stack-small-4     	  619755	      1003 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/stack-small-4     	  606742	       998.5 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/stack-small-4     	  620220	       994.6 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/stack-small-4     	  626042	       994.1 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/missing/stack-small-4     	  601904	      1004 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  183147	      3265 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  180145	      3235 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  178066	      3284 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  176529	      3295 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/current-4          	  175273	      3328 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/stack-small-4      	  421999	      1277 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/stack-small-4      	  478640	      1279 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/stack-small-4      	  464457	      1265 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/stack-small-4      	  441973	      1291 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/sparse/stack-small-4      	  479210	      1296 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  155784	      3869 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  148740	      3904 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  150584	      3901 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  148785	      3930 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/current-4           	  158656	      3823 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/stack-small-4       	  151126	      3873 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/stack-small-4       	  152539	      3890 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/stack-small-4       	  149491	      3869 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/stack-small-4       	  156632	      3873 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/dense/stack-small-4       	  155008	      3909 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  150410	      3849 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  159688	      3790 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  162967	      3803 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  158845	      3751 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/current-4             	  152908	      3839 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/stack-small-4         	  161518	      3868 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/stack-small-4         	  168478	      3754 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/stack-small-4         	  160024	      3788 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/stack-small-4         	  158005	      3822 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=100/all/stack-small-4         	  156746	      3803 ns/op	       100.0 result-cap	   18432 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17306	     34746 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17444	     34503 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17544	     34193 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17452	     34329 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/current-4        	   17523	     33988 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/stack-small-4    	   48352	     12501 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/stack-small-4    	   47809	     12642 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/stack-small-4    	   45596	     12710 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/stack-small-4    	   49136	     12436 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/missing/stack-small-4    	   48387	     12615 ns/op	         0 result-cap	       0 B/op	       0 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4         	   16604	     35929 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4         	   16596	     36007 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4         	   16861	     35582 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4         	   16671	     35759 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/current-4         	   16960	     35497 ns/op	      1000 result-cap	  172033 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/stack-small-4     	   46443	     13247 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/stack-small-4     	   45523	     13357 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/stack-small-4     	   45703	     13233 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/stack-small-4     	   45637	     13080 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/sparse/stack-small-4     	   44672	     13400 ns/op	        10.00 result-cap	    1792 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4          	   14042	     42536 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4          	   13717	     43630 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4          	   14262	     42089 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4          	   14650	     40747 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/current-4          	   14672	     40621 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/stack-small-4      	   14696	     41312 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/stack-small-4      	   15034	     39772 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/stack-small-4      	   14930	     40270 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/stack-small-4      	   14938	     40306 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/dense/stack-small-4      	   14142	     42345 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4            	   14619	     41033 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4            	   14832	     40552 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4            	   14660	     40588 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4            	   13855	     42700 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/current-4            	   14883	     40591 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/stack-small-4        	   13900	     42933 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/stack-small-4        	   15183	     39512 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/stack-small-4        	   15183	     39759 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/stack-small-4        	   14608	     40482 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
BenchmarkScopedListTwoStage/resident=1000/all/stack-small-4        	   14997	     39826 ns/op	      1000 result-cap	  172032 B/op	       1 allocs/op
PASS
ok  	github.com/agenthub/edge-server/internal/store	47.959s

Final temporary experiment source (not part of delivery)

package store

import (
	"fmt"
	"testing"
)

// Temporary component controls only: no Store lock, SQL, or production changes.
// The fixture/selection checks are shared with the real-facade benchmark.
func BenchmarkScopedListStrategies(b *testing.B) {
	s := scopedListBenchmarkStore(b, 1000)
	for _, scope := range []struct {
		name, threadID string
		first, count   int
	}{
		{"missing", "missing", 0, 0},
		{"sparse", "sparse", 0, 10},
		{"dense", "dense", 10, 990},
		{"all", "", 0, 1000},
	} {
		for _, strategy := range []struct {
			name  string
			query func([]string, map[string]Run, func(Run) bool) []Run
		}{
			{"current", filterOrdered[Run]},
			{"lazy-full", experimentLazyFull},
			{"small-cap16", experimentSmallCapacity},
			{"count-first", experimentCountFirst},
		} {
			b.Run(scope.name+"/"+strategy.name, func(b *testing.B) {
				keep := func(run Run) bool { return scopeEquals(scope.threadID, run.ThreadID) }
				id := func(run Run) string { return run.ID }
				got := strategy.query(s.runOrder, s.runs, keep)
				checkScopedListBenchmarkIDs(b, got, scope.first, scope.count, "run", id)
				b.ReportAllocs()
				for b.Loop() {
					got = strategy.query(s.runOrder, s.runs, keep)
				}
				checkScopedListBenchmarkIDs(b, got, scope.first, scope.count, "run", id)
				b.ReportMetric(float64(cap(got)), "result-cap")
			})
		}
	}
}

func experimentLazyFull(order []string, items map[string]Run, keep func(Run) bool) []Run {
	out := make([]Run, 0)
	for _, id := range order {
		item := items[id]
		if keep(item) {
			if cap(out) == 0 {
				out = make([]Run, 0, len(order))
			}
			out = append(out, item)
		}
	}
	return out
}

func experimentSmallCapacity(order []string, items map[string]Run, keep func(Run) bool) []Run {
	out := make([]Run, 0, min(16, len(order)))
	for _, id := range order {
		item := items[id]
		if keep(item) {
			out = append(out, item)
		}
	}
	return out
}

func experimentCountFirst(order []string, items map[string]Run, keep func(Run) bool) []Run {
	count := 0
	for _, id := range order {
		if keep(items[id]) {
			count++
		}
	}
	out := make([]Run, 0, count)
	if count == 0 {
		return out
	}
	for _, id := range order {
		item := items[id]
		if keep(item) {
			out = append(out, item)
		}
	}
	return out
}

func BenchmarkScopedListTwoStage(b *testing.B) {
	for _, total := range []int{100, 1000} {
		b.Run(fmt.Sprintf("resident=%d", total), func(b *testing.B) {
			s := scopedListBenchmarkStore(b, total)
			for _, scope := range []struct {
				name, threadID string
				first, count   int
			}{
				{"missing", "missing", 0, 0},
				{"sparse", "sparse", 0, 10},
				{"dense", "dense", 10, total - 10},
				{"all", "", 0, total},
			} {
				for _, strategy := range []struct {
					name  string
					query func([]string, map[string]Run, func(Run) bool) []Run
				}{
					{"current", filterOrdered[Run]},
					{"small-then-full", experimentSmallThenFull},
					{"stack-small", experimentStackSmall},
				} {
					b.Run(scope.name+"/"+strategy.name, func(b *testing.B) {
						keep := func(run Run) bool { return scopeEquals(scope.threadID, run.ThreadID) }
						id := func(run Run) string { return run.ID }
						got := strategy.query(s.runOrder, s.runs, keep)
						checkScopedListBenchmarkIDs(b, got, scope.first, scope.count, "run", id)
						b.ReportAllocs()
						for b.Loop() {
							got = strategy.query(s.runOrder, s.runs, keep)
						}
						checkScopedListBenchmarkIDs(b, got, scope.first, scope.count, "run", id)
						b.ReportMetric(float64(cap(got)), "result-cap")
					})
				}
			}
		})
	}
}

func experimentSmallThenFull(order []string, items map[string]Run, keep func(Run) bool) []Run {
	out := make([]Run, 0)
	for _, id := range order {
		item := items[id]
		if !keep(item) {
			continue
		}
		if len(out) == cap(out) {
			capacity := len(order)
			if len(out) == 0 {
				capacity = min(16, capacity)
			}
			grown := make([]Run, len(out), capacity)
			copy(grown, out)
			out = grown
		}
		out = append(out, item)
	}
	return out
}

func experimentStackSmall(order []string, items map[string]Run, keep func(Run) bool) []Run {
	var small [16]Run
	count := 0
	for index, id := range order {
		item := items[id]
		if !keep(item) {
			continue
		}
		if count < len(small) {
			small[count] = item
			count++
			continue
		}
		out := make([]Run, count, len(order))
		copy(out, small[:])
		out = append(out, item)
		for _, remainingID := range order[index+1:] {
			remaining := items[remainingID]
			if keep(remaining) {
				out = append(out, remaining)
			}
		}
		return out
	}
	out := make([]Run, count)
	copy(out, small[:count])
	return out
}

[DeliciousBuding]

Real facade result and acceptance evidence

Implemented source: 5ab5fca23881e77031d093ea9bff5a35cc1202ec; unchanged benchmark fixture first committed at 90e06a9c1759d95517cddaedb92b00f114948bc8. Production base: 4e3739e39402d1de7dec83c4f6f4be3609d181b9. The candidate facade measurement below was taken with the same production query code and new regression tests before commit; the temporary experiment file has since been removed. All package validation below was run after its removal.

The change stages at most 16 selected rows in a local array, returns a correctly sized copy for small results, and allocates once at full capacity on overflow. Artifacts reuse the selection helper and deep-clone only selected content-source metadata. No API/schema/SQL/index/pool/debounce change.

Same facade fixture: 80 candidate samples versus the 80-sample baseline

Linux/amd64, Ubuntu 24.04 under WSL2, Go 1.26.5, i7-14700HX, GOMAXPROCS=4. From edge-server:

CGO_ENABLED=1 go test -p 2 ./internal/store \
  -run '^(TestFilterOrderedSinglePass|TestCollectAndFilterOrdered|TestListClonedArtifacts|TestScopedListHelpers|TestListSortedThreadItemsAndPins)$' \
  -bench '^BenchmarkStoreScopedLists$' -benchtime=1s -count=5 -cpu=4 -benchmem -timeout=10m

Case	median us/call, before → after	allocated B/call	allocs/call
resident=100/runs/missing	3.354 → 1.134	18432 → 0	1 → 0
resident=100/artifacts/missing	5.338 → 0.825	18368 → 0	101 → 0
resident=100/runs/sparse	3.904 → 1.388	18432 → 1792	1 → 1
resident=100/artifacts/sparse	5.356 → 1.395	18368 → 1888	101 → 11
resident=100/runs/dense	4.091 → 3.809	18432 → 18432	1 → 1
resident=100/artifacts/dense	6.587 → 5.343	18368 → 17888	101 → 91
resident=100/runs/all	4.194 → 3.829	18432 → 18432	1 → 1
resident=100/artifacts/all	6.107 → 5.726	18368 → 18368	101 → 101
resident=1000/runs/missing	37.655 → 12.968	172033 → 0	1 → 0
resident=1000/artifacts/missing	63.472 → 10.810	179072 → 0	1001 → 0
resident=1000/runs/sparse	42.135 → 13.325	172033 → 1792	1 → 1
resident=1000/artifacts/sparse	68.530 → 13.002	179072 → 1888	1001 → 11
resident=1000/runs/dense	48.154 → 49.430	172032 → 172032	1 → 1
resident=1000/artifacts/dense	67.312 → 67.099	179072 → 178592	1001 → 991
resident=1000/runs/all	41.954 → 47.151	172032 → 172032	1 → 1
resident=1000/artifacts/all	66.386 → 67.096	179072 → 179072	1001 → 1001

At 1,000 resident artifacts, missing queries go from 1,001 allocations to zero; ten-result queries go from 179,072 B / 1,001 allocations to 1,888 B / 11 allocations. Ten-run queries go from about 172 KB to 1,792 B. Empty results remain non-nil. Dense/all result-array allocation remains unchanged; artifact dense controls stop cloning the ten rejected rows.

Timing caveat, not hidden: the first candidate run showed +12.4% for 1,000-row unfiltered runs. Therefore two test binaries were built from baseline and candidate production code, with identical benchmark/regression test sources and without the temporary experiment file, then run sequentially baseline → candidate → baseline → candidate. Each block used three repetitions, yielding 48 additional samples, six per variant/case. No other local validation workload was run concurrently.

Build each source with CGO_ENABLED=1 go test -p 2 -c ./internal/store -o store-query.test; execute with:

./store-query.test -test.run='^$' \
  -test.bench='^BenchmarkStoreScopedLists$/^resident=(100|1000)$/^runs$/^(dense|all)$' \
  -test.benchtime=1s -test.count=3 -test.cpu=4 -test.benchmem -test.timeout=5m

Case	baseline median (min–max), us	candidate median (min–max), us	median change
resident=100/runs/dense	4.083 (3.766–4.252)	3.958 (3.836–4.118)	-3.1%
resident=100/runs/all	3.849 (3.720–4.031)	4.001 (3.917–4.144)	3.9%
resident=1000/runs/dense	49.765 (47.964–56.963)	51.105 (50.657–52.204)	2.7%
resident=1000/runs/all	48.309 (47.021–53.913)	50.904 (38.790–51.284)	5.4%

These controls overlap in observed ranges; the 1,000-row dense/all medians are +2.7%/+5.4%, not a demonstrated universal speedup or proof of zero regression. The narrow allocation improvement is retained because it removes the measured per-scope allocation/clone waste without geometric dense allocation growth. Do not present these local samples as production throughput, request p50, retained heap or RSS. No runtime request distribution was measured.

Behavior, platform and static validation

All passed on the final delivery files:

• Linux: CGO_ENABLED=1 go test -race -p 2 ./internal/store -count=1 -cpu=4 -timeout=10m.
• Windows: CGO_ENABLED=0 go test -p 2 ./internal/store -count=1 -cpu=4 -timeout=10m. This is the Edge store pure-Go SQLite path, not the Hub CGO gate.
• Windows CGO_ENABLED=0 go vet -p 2 ./internal/store and staticcheck ./internal/store (2026.1 / v0.7.0).
• git diff --check.
• Go 1.26.5 compiler escape diagnostics for all instantiated filterOrdered shapes reported no moved to heap: small; returned slices escape as expected. This is consistent with the measured one/zero result allocations, not a portable promise about all future Go versions.

Regression coverage checks exactly one predicate visit per ordered row, interleaved selection through 0/1/16/17/40 matches, preserved order, non-nil empty results, empty-scope behavior, nil content sources, and detached mutable artifact content-source metadata in small/dense/all results. No timing, fixed-capacity or implementation-constant assertion was added.

The temporary parallel implementations were archived in the experiment comment and removed. Architecture/API docs remain accurate: normal reads still use the in-memory Store; the internal allocation strategy is recorded here rather than duplicated into permanent architecture prose. Required PR checks and merge are still pending at this comment. No deployment or real-model/packaged-app acceptance was performed.

All 80 candidate facade samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	 1000000	      1130 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	 1000000	      1131 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	 1000000	      1139 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	 1000000	      1134 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/missing-4         	 1000000	      1140 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	 1453622	       825.5 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	 1466943	       821.3 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	 1446769	       824.9 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	 1472161	       825.3 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/missing-4    	 1466806	       818.9 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  741399	      1386 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  872461	      1382 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  860576	      1388 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  846728	      1390 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/sparse-4          	  774180	      1507 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  819284	      1495 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  813579	      1398 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  898537	      1365 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  846020	      1383 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/sparse-4     	  852705	      1395 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  310207	      3830 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  298582	      3800 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  302144	      3809 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  310598	      3808 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4           	  314334	      3855 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  215716	      5343 ns/op	       100.0 result-cap	        90.00 results/op	   17888 B/op	      91 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  224122	      5357 ns/op	       100.0 result-cap	        90.00 results/op	   17888 B/op	      91 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  215162	      5363 ns/op	       100.0 result-cap	        90.00 results/op	   17888 B/op	      91 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  226010	      5325 ns/op	       100.0 result-cap	        90.00 results/op	   17888 B/op	      91 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/dense-4      	  225244	      5296 ns/op	       100.0 result-cap	        90.00 results/op	   17888 B/op	      91 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  323330	      3799 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  311658	      3824 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  324978	      3885 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  325382	      3829 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4             	  307527	      4121 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  190377	      6136 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  193462	      5858 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  215971	      5726 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  208024	      5675 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=100/artifacts/all-4        	  210147	      5652 ns/op	       100.0 result-cap	       100.0 results/op	   18368 B/op	     101 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   94987	     12926 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   92792	     13021 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   93962	     12968 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   95071	     12933 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/missing-4        	   92584	     13063 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	  112030	     10654 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	  114327	     10830 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	  113007	     10789 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	  112228	     10810 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/missing-4   	  108654	     10887 ns/op	         0 result-cap	         0 results/op	       0 B/op	       0 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   89956	     13188 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   91488	     13325 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   90801	     13318 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   90331	     13360 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/sparse-4         	   81078	     13925 ns/op	        10.00 result-cap	        10.00 results/op	    1792 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   90852	     12766 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   86037	     13691 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   86666	     13650 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   90438	     13002 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/sparse-4    	   96546	     12607 ns/op	        10.00 result-cap	        10.00 results/op	    1888 B/op	      11 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   24535	     49532 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   23880	     49430 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   29148	     43132 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   24066	     49585 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4          	   25093	     47175 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17803	     67099 ns/op	      1000 result-cap	       990.0 results/op	  178592 B/op	     991 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   18013	     67257 ns/op	      1000 result-cap	       990.0 results/op	  178592 B/op	     991 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17908	     66857 ns/op	      1000 result-cap	       990.0 results/op	  178592 B/op	     991 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   18150	     66522 ns/op	      1000 result-cap	       990.0 results/op	  178592 B/op	     991 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/dense-4     	   17857	     67771 ns/op	      1000 result-cap	       990.0 results/op	  178592 B/op	     991 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   24097	     48914 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   24892	     46405 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   25293	     47151 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   24610	     48410 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4            	   26175	     44805 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   17494	     68035 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   17785	     66930 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   17974	     67096 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   17809	     67111 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
BenchmarkStoreScopedLists/resident=1000/artifacts/all-4       	   17791	     67042 ns/op	      1000 result-cap	      1000 results/op	  179072 B/op	    1001 allocs/op
PASS
ok  	github.com/agenthub/edge-server/internal/store	95.266s

baseline-1 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  300679	      3972 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  294931	      3865 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  326373	      3766 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  310741	      3769 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  337758	      3720 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  302550	      3812 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   24528	     49074 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   25053	     47973 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   25020	     47964 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   25599	     47304 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   25597	     47178 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   25581	     47021 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
PASS

baseline-2 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  306879	      4194 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  267337	      4206 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  276385	      4252 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  275960	      4031 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  304923	      3887 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  305012	      3916 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   24634	     50456 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   21487	     55224 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   20546	     56963 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   21894	     53913 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   23834	     50213 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   24409	     49315 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
PASS

candidate-1 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  302052	      3836 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  314248	      3858 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  300800	      3885 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  296310	      3917 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  313256	      3958 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  308020	      3926 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23392	     51322 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23509	     50962 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23637	     50657 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   23832	     51045 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   23499	     51177 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   23646	     50762 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
PASS

candidate-2 raw samples

goos: linux
goarch: amd64
pkg: github.com/agenthub/edge-server/internal/store
cpu: Intel(R) Core(TM) i7-14700HX
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  290421	      4108 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  292366	      4118 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/dense-4         	  278631	      4030 ns/op	       100.0 result-cap	        90.00 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  277647	      4144 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  305046	      4044 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=100/runs/all-4           	  299954	      4112 ns/op	       100.0 result-cap	       100.0 results/op	   18432 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23052	     52204 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23250	     51248 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/dense-4        	   23863	     50684 ns/op	      1000 result-cap	       990.0 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   23710	     51284 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   24914	     48790 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
BenchmarkStoreScopedLists/resident=1000/runs/all-4          	   31136	     38790 ns/op	      1000 result-cap	      1000 results/op	  172032 B/op	       1 allocs/op
PASS

[DeliciousBuding]

Closed: merged and cleaned

Delivered by #2338, squash commit 6fe72fdfabdadbf1ab174b95d877bdf021e3ceb6. All seven required checks passed for PR head 5ab5fca23881e77031d093ea9bff5a35cc1202ec with strict branch protection unchanged: validate, go-edge, go-hub, windows-go, windows-frontend, backend-required, frontend-required (CI run). Backend integration and fixture E2E checks passed; path-filtered/dispatch-only skipped lanes and CodeRabbit's skipped review are not counted as stronger evidence.

The 448 baseline/candidate/strategy/control samples, rejected alternatives and behavior/platform validation are preserved in the comments above. The measured allocation reduction is retained with the explicit dense/all timing limitation; this does not establish universal latency, RSS or production-throughput gains.

The merged tree was compared against the tested branch with no difference. The source checkout is updated; the merged task worktree/local/remote branch, temporary comparison implementations and binaries are removed. Private source-versus-runtime documentation is synchronized, unrelated WIP is untouched, and no service synchronization, rebuild, restart or deployment was performed.

No open work remains for this bounded slice. #2304 and #1663 remain independent follow-ups; #2256 stays closed for its original scope.