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build/wasm: pin one LLGo Binaryen release for Emscripten and WASI - #2652

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cpunion merged 7 commits into
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cpunion:codex/binaryen-toolchain
Sep 26, 2026
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build/wasm: pin one LLGo Binaryen release for Emscripten and WASI#2652
cpunion merged 7 commits into
xgo-dev:mainfrom
cpunion:codex/binaryen-toolchain

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@cpunion

@cpunion cpunion commented Sep 23, 2026 •
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LLGo's Emscripten and WASI post-link paths can select different Binaryen installations. CI also paired Emscripten 4.0.21 (Binaryen 125) with Binaryen 132, and upstream Binaryen 132 does not contain LLGo's reviewed DWARF/Asyncify backport or the Memory64 DWARF repair.

Install the published xgo-dev/binaryen llgo-v132.3 release for all CI host platforms. Archive SHA-256 values are pinned in the repository and checked before extraction. Export its root as EM_BINARYEN_ROOT and its wasm-opt as WASMOPT, so Emscripten and the standalone WASI post-link use the same toolchain. Both required tools are checked and their versions logged. An explicit WASMOPT remains an override; a failed post-link reports the selected executable path and version. Update Wasm runtime and benchmark CI to Emscripten 6.0.8, whose expected Binaryen version is 132.

Validation: the llgo-v132.3 release workflow passed all six platform build/test jobs and published seven archives. Each .sha256 sidecar matches its GitHub asset digest. The macOS ARM64 archive passed a local SHA-256 check, extraction, and version checks for wasm-opt and wasm-emscripten-finalize. With that release and Emscripten 6.0.8, dependent #2662 passed final-Wasm DWARF verification, Go/C++ source lookup, and Node/Wasmtime execution for J32, J64, and W32 at O0/O2. The stacked #2662 head also passed the full dev/test_wasm_single_worker.sh test-command suite with llgo-v132.3. Focused internal/build post-link tests, 15 CI policy tests, workflow actionlint, and git diff --check passed. Previous PR CI on llgo-v132.2 passed both Wasm runtime suites, cross-compile, multi-host Binaryen setup, and Codecov patch coverage; CI will re-run on this pin update.

Related: #2632, xgo-dev/binaryen#2, xgo-dev/binaryen#4, and dependent #2662.

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codecov Bot commented Sep 23, 2026 •
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Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

@cpunion cpunion mentioned this pull request Sep 23, 2026
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cpunion force-pushed the codex/binaryen-toolchain branch from fda1e16 to 08e58d7 Compare September 23, 2026 11:08
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LLGo baseline benchmarks

b969914fe900 | workflow run | long-term charts

Program measurements

Platform Workload File size vs base Text size vs base Build vs base Run vs base
Linux cprintf 7160 B 0 B / +0.0% 387 B 0 B / +0.0% 462.095 ms -19.99 ms / -4.1% (better) 1.309 ms +67.2 us / +5.4% (worse)
Linux cprintf-lto 6912 B 0 B / +0.0% 368 B 0 B / +0.0% 454.984 ms -25.98 ms / -5.4% (better) 1.256 ms +12.29 us / +1.0% (worse)
Linux fmtprintf 1637752 B 0 B / +0.0% 484801 B 0 B / +0.0% 3.884 s -13.68 ms / -0.4% (better) 3.090 ms -102.3 us / -3.2% (better)
Linux fmtprintf-lto 1478056 B 0 B / +0.0% 422422 B 0 B / +0.0% 10.705 s -328.9 ms / -3.0% (better) 3.003 ms +98.97 us / +3.4% (worse)
Linux println 61344 B 0 B / +0.0% 14171 B 0 B / +0.0% 487.770 ms -25.65 ms / -5.0% (better) 1.650 ms -365 us / -18.1% (better)
Linux println-lto 54152 B 0 B / +0.0% 12073 B 0 B / +0.0% 677.396 ms +5.223 ms / +0.8% (worse) 1.591 ms -62.06 us / -3.8% (better)
macOS cprintf 68064 B 0 B / +0.0% 4429 B 0 B / +0.0% 771.155 ms +48.52 ms / +6.7% (worse) 3.503 ms +214.3 us / +6.5% (worse)
macOS cprintf-lto 84288 B 0 B / +0.0% 193 B 0 B / +0.0% 686.653 ms -270.9 ms / -28.3% (better) 2.831 ms -1.897 ms / -40.1% (better)
macOS fmtprintf 1483792 B 0 B / +0.0% 860028 B 0 B / +0.0% 3.382 s -1.576 s / -31.8% (better) 5.864 ms -1.731 ms / -22.8% (better)
macOS fmtprintf-lto 1175808 B 0 B / +0.0% 832668 B 0 B / +0.0% 7.863 s -2.092 s / -21.0% (better) 6.509 ms -3.577 ms / -35.5% (better)
macOS println 114512 B 0 B / +0.0% 34330 B 0 B / +0.0% 595.309 ms -294.2 ms / -33.1% (better) 3.635 ms -2.036 ms / -35.9% (better)
macOS println-lto 118720 B 0 B / +0.0% 32308 B 0 B / +0.0% 728.930 ms -431.2 ms / -37.2% (better) 4.854 ms -2.464 ms / -33.7% (better)
Windows MinGW cprintf 19456 B 0 B / +0.0% 4550 B 0 B / +0.0% 1.172 s +42.09 ms / +3.7% (worse) 3.426 ms -5.7 us / -0.2% (better)
Windows MinGW cprintf-lto 17920 B 0 B / +0.0% 4486 B 0 B / +0.0% 1.154 s -37.21 ms / -3.1% (better) 3.495 ms -184.9 us / -5.0% (better)
Windows MinGW fmtprintf 1910784 B 0 B / +0.0% 586422 B 0 B / +0.0% 4.283 s +111.7 ms / +2.7% (worse) 8.203 ms -1.181 ms / -12.6% (better)
Windows MinGW fmtprintf-lto 1933824 B 0 B / +0.0% 535158 B 0 B / +0.0% 10.289 s +283.1 ms / +2.8% (worse) 8.121 ms -578.1 us / -6.6% (better)
Windows MinGW println 70656 B 0 B / +0.0% 23062 B 0 B / +0.0% 1.157 s +3.518 ms / +0.3% (worse) 6.791 ms +309.6 us / +4.8% (worse)
Windows MinGW println-lto 65024 B 0 B / +0.0% 20358 B 0 B / +0.0% 1.397 s +18.12 ms / +1.3% (worse) 6.704 ms +31.2 us / +0.5% (worse)
Windows MinGW 386 cprintf 43008 B 0 B / +0.0% 5326 B 0 B / +0.0% 1.071 s -16.43 ms / -1.5% (better) 5.004 ms -272 us / -5.2% (better)
Windows MinGW 386 cprintf-lto 20992 B 0 B / +0.0% 5094 B 0 B / +0.0% 1.119 s -8.876 ms / -0.8% (better) 5.676 ms +111.7 us / +2.0% (worse)
Windows MinGW 386 fmtprintf 1875968 B 0 B / +0.0% 462622 B 0 B / +0.0% 4.126 s +3.288 ms / +0.1% (worse) 9.993 ms -530.8 us / -5.0% (better)
Windows MinGW 386 fmtprintf-lto 2152448 B 0 B / +0.0% 440178 B 0 B / +0.0% 9.638 s +107.1 ms / +1.1% (worse) 10.204 ms -1.223 ms / -10.7% (better)
Windows MinGW 386 println 91136 B 0 B / +0.0% 19814 B 0 B / +0.0% 1.095 s -15.88 ms / -1.4% (better) 8.705 ms -604 us / -6.5% (better)
Windows MinGW 386 println-lto 69120 B 0 B / +0.0% 17726 B 0 B / +0.0% 1.296 s -24.15 ms / -1.8% (better) 8.381 ms -458.6 us / -5.2% (better)
Windows MinGW ARM64 cprintf 18944 B 0 B / +0.0% 4408 B 0 B / +0.0% 1.364 s +65.06 ms / +5.0% (worse) 6.322 ms +35.5 us / +0.6% (worse)
Windows MinGW ARM64 cprintf-lto 17920 B 0 B / +0.0% 4340 B 0 B / +0.0% 1.557 s +208.6 ms / +15.5% (worse) 8.313 ms +2.344 ms / +39.3% (worse)
Windows MinGW ARM64 fmtprintf 1799168 B 0 B / +0.0% 499204 B 0 B / +0.0% 3.971 s +33.94 ms / +0.9% (worse) 11.409 ms -267.5 us / -2.3% (better)
Windows MinGW ARM64 fmtprintf-lto 1857536 B 0 B / +0.0% 465312 B 0 B / +0.0% 9.109 s +77.18 ms / +0.9% (worse) 11.506 ms -20.2 us / -0.2% (better)
Windows MinGW ARM64 println 67072 B 0 B / +0.0% 21816 B 0 B / +0.0% 1.371 s +121.8 ms / +9.8% (worse) 10.409 ms +437.2 us / +4.4% (worse)
Windows MinGW ARM64 println-lto 63488 B 0 B / +0.0% 19436 B 0 B / +0.0% 1.517 s +83.89 ms / +5.9% (worse) 10.588 ms +585.2 us / +5.9% (worse)
Windows MSVC cprintf 120320 B 0 B / +0.0% 65782 B 0 B / +0.0% 894.429 ms -7.42 ms / -0.8% (better) 3.516 ms +121.3 us / +3.6% (worse)
Windows MSVC cprintf-lto 119808 B 0 B / +0.0% 65718 B 0 B / +0.0% 920.286 ms -14.7 ms / -1.6% (better) 3.408 ms -54.2 us / -1.6% (better)
Windows MSVC fmtprintf 1624576 B 0 B / +0.0% 681958 B 0 B / +0.0% 3.749 s +31.02 ms / +0.8% (worse) 10.384 ms +1.288 ms / +14.2% (worse)
Windows MSVC fmtprintf-lto 1615872 B 0 B / +0.0% 635126 B 0 B / +0.0% 8.963 s +1.793 ms / +0.02001% (worse) 9.338 ms -402.2 us / -4.1% (better)
Windows MSVC println 192000 B 0 B / +0.0% 118486 B 0 B / +0.0% 906.002 ms -9.421 ms / -1.0% (better) 7.183 ms -1.008 ms / -12.3% (better)
Windows MSVC println-lto 189952 B 0 B / +0.0% 116326 B 0 B / +0.0% 1.094 s -14.24 ms / -1.3% (better) 7.292 ms +232.7 us / +3.3% (worse)
Windows MSVC 386 cprintf 9728 B 0 B / +0.0% 3931 B 0 B / +0.0% 1.014 s +108.3 ms / +12.0% (worse) 5.652 ms +259.6 us / +4.8% (worse)
Windows MSVC 386 cprintf-lto 9216 B 0 B / +0.0% 3853 B 0 B / +0.0% 990.860 ms -120 ms / -10.8% (better) 5.851 ms -1.394 ms / -19.2% (better)
Windows MSVC 386 fmtprintf 1189376 B 0 B / +0.0% 446005 B 0 B / +0.0% 4.038 s +179.1 ms / +4.6% (worse) 11.821 ms +808 us / +7.3% (worse)
Windows MSVC 386 fmtprintf-lto 1224192 B 0 B / +0.0% 416617 B 0 B / +0.0% 8.951 s +145.6 ms / +1.7% (worse) 11.459 ms -665.4 us / -5.5% (better)
Windows MSVC 386 println 34304 B 0 B / +0.0% 18641 B 0 B / +0.0% 1.163 s +232 ms / +24.9% (worse) 12.601 ms +1.288 ms / +11.4% (worse)
Windows MSVC 386 println-lto 32256 B 0 B / +0.0% 16839 B 0 B / +0.0% 1.184 s +65.46 ms / +5.9% (worse) 9.591 ms +553 us / +6.1% (worse)
Windows MSVC ARM64 cprintf 11264 B 0 B / +0.0% 3976 B 0 B / +0.0% 1.061 s +131.1 us / +0.01236% (worse) 6.876 ms +105.8 us / +1.6% (worse)
Windows MSVC ARM64 cprintf-lto 10752 B 0 B / +0.0% 3868 B 0 B / +0.0% 1.072 s -6.947 ms / -0.6% (better) 6.921 ms +306.6 us / +4.6% (worse)
Windows MSVC ARM64 fmtprintf 1370112 B 0 B / +0.0% 498868 B 0 B / +0.0% 3.821 s +34.55 ms / +0.9% (worse) 14.526 ms +913.9 us / +6.7% (worse)
Windows MSVC ARM64 fmtprintf-lto 1387008 B 0 B / +0.0% 465732 B 0 B / +0.0% 8.688 s +146.1 ms / +1.7% (worse) 15.069 ms +810.3 us / +5.7% (worse)
Windows MSVC ARM64 println 41472 B 0 B / +0.0% 21608 B 0 B / +0.0% 1.072 s +1.451 ms / +0.1% (worse) 12.388 ms +377.3 us / +3.1% (worse)
Windows MSVC ARM64 println-lto 39424 B 0 B / +0.0% 19340 B 0 B / +0.0% 1.237 s +1.796 ms / +0.1% (worse) 11.803 ms -228.1 us / -1.9% (better)
Core language and compiler benchmarks
Platform Benchmark ns/op vs base
Linux BenchmarkLookupPCRandom 14.560 ns/op -0.16 ns/op / -1.1% (better)
Linux BenchmarkMergeCompilerFlags 202.800 ns/op +8.8 ns/op / +4.5% (worse)
Linux BenchmarkMergeLinkerFlags 131.700 ns/op +5.2 ns/op / +4.1% (worse)
Linux BenchmarkChannelBuffered 55.300 ns/op +0.2 ns/op / +0.4% (worse)
Linux BenchmarkChannelHandoff 15278 ns/op +1442 ns/op / +10.4% (worse)
Linux BenchmarkDefer 47.380 ns/op +0.9 ns/op / +1.9% (worse)
Linux BenchmarkDirectCall 1.569 ns/op +0.006 ns/op / +0.4% (worse)
Linux BenchmarkGlobalRead 1.555 ns/op +0.002 ns/op / +0.1% (worse)
Linux BenchmarkGlobalWrite 7.782 ns/op +0.019 ns/op / +0.2% (worse)
Linux BenchmarkGoroutine 20825 ns/op -358 ns/op / -1.7% (better)
Linux BenchmarkInterfaceCall 5.887 ns/op -0.005 ns/op / -0.1% (better)
Linux BenchmarkRuntimeGetG 2.503 ns/op +0.075 ns/op / +3.1% (worse)
macOS BenchmarkLookupPCRandom 12.740 ns/op -3.91 ns/op / -23.5% (better)
macOS BenchmarkMergeCompilerFlags 103.600 ns/op -60.8 ns/op / -37.0% (better)
macOS BenchmarkMergeLinkerFlags 59.700 ns/op -25.48 ns/op / -29.9% (better)
macOS BenchmarkChannelBuffered 46.380 ns/op +14.49 ns/op / +45.4% (worse)
macOS BenchmarkChannelHandoff 10992 ns/op +4319 ns/op / +64.7% (worse)
macOS BenchmarkDefer 48.420 ns/op +1.91 ns/op / +4.1% (worse)
macOS BenchmarkDirectCall 1.173 ns/op -0.086 ns/op / -6.8% (better)
macOS BenchmarkGlobalRead 1.053 ns/op -0.292 ns/op / -21.7% (better)
macOS BenchmarkGlobalWrite 1.109 ns/op -0.28 ns/op / -20.2% (better)
macOS BenchmarkGoroutine 68721 ns/op +15346 ns/op / +28.8% (worse)
macOS BenchmarkInterfaceCall 5.205 ns/op +0.218 ns/op / +4.4% (worse)
macOS BenchmarkRuntimeGetG 2.609 ns/op +0.331 ns/op / +14.5% (worse)
Windows MinGW BenchmarkLookupPCRandom 13.290 ns/op +0.11 ns/op / +0.8% (worse)
Windows MinGW BenchmarkMergeCompilerFlags 623.600 ns/op +3.3 ns/op / +0.5% (worse)
Windows MinGW BenchmarkMergeLinkerFlags 562.700 ns/op +21.5 ns/op / +4.0% (worse)
Windows MinGW BenchmarkChannelBuffered 30.430 ns/op -1.45 ns/op / -4.5% (better)
Windows MinGW BenchmarkChannelHandoff 998.800 ns/op -88.2 ns/op / -8.1% (better)
Windows MinGW BenchmarkDefer 58.130 ns/op -0.21 ns/op / -0.4% (better)
Windows MinGW BenchmarkDirectCall 1.547 ns/op 0 ns/op / +0.0%
Windows MinGW BenchmarkGlobalRead 1.547 ns/op -0.002 ns/op / -0.1% (better)
Windows MinGW BenchmarkGlobalWrite 2.470 ns/op 0 ns/op / +0.0%
Windows MinGW BenchmarkGoroutine 85677 ns/op +3081 ns/op / +3.7% (worse)
Windows MinGW BenchmarkInterfaceCall 8.063 ns/op -0.002 ns/op / -0.0248% (better)
Windows MinGW BenchmarkRuntimeGetG 2.482 ns/op -0.045 ns/op / -1.8% (better)
Windows MinGW 386 BenchmarkLookupPCRandom 26.520 ns/op +0.04 ns/op / +0.2% (worse)
Windows MinGW 386 BenchmarkMergeCompilerFlags 766.500 ns/op +31.8 ns/op / +4.3% (worse)
Windows MinGW 386 BenchmarkMergeLinkerFlags 705.700 ns/op +19.6 ns/op / +2.9% (worse)
Windows MinGW 386 BenchmarkChannelBuffered 39.390 ns/op -0.07 ns/op / -0.2% (better)
Windows MinGW 386 BenchmarkChannelHandoff 920.300 ns/op +130.9 ns/op / +16.6% (worse)
Windows MinGW 386 BenchmarkDefer 43.510 ns/op +0.85 ns/op / +2.0% (worse)
Windows MinGW 386 BenchmarkDirectCall 1.547 ns/op -0.001 ns/op / -0.1% (better)
Windows MinGW 386 BenchmarkGlobalRead 1.547 ns/op -0.003 ns/op / -0.2% (better)
Windows MinGW 386 BenchmarkGlobalWrite 7.777 ns/op +0.008 ns/op / +0.1% (worse)
Windows MinGW 386 BenchmarkGoroutine 88374 ns/op +1680 ns/op / +1.9% (worse)
Windows MinGW 386 BenchmarkInterfaceCall 8.353 ns/op +0.006 ns/op / +0.1% (worse)
Windows MinGW 386 BenchmarkRuntimeGetG 2.168 ns/op -0.001 ns/op / -0.0461% (better)
Windows MinGW ARM64 BenchmarkLookupPCRandom 12.070 ns/op -0.02 ns/op / -0.2% (better)
Windows MinGW ARM64 BenchmarkMergeCompilerFlags 564.900 ns/op +4.5 ns/op / +0.8% (worse)
Windows MinGW ARM64 BenchmarkMergeLinkerFlags 529.800 ns/op -0.2 ns/op / -0.03774% (better)
Windows MinGW ARM64 BenchmarkChannelBuffered 39.640 ns/op +1.81 ns/op / +4.8% (worse)
Windows MinGW ARM64 BenchmarkChannelHandoff 2806 ns/op +517 ns/op / +22.6% (worse)
Windows MinGW ARM64 BenchmarkDefer 52.570 ns/op +0.35 ns/op / +0.7% (worse)
Windows MinGW ARM64 BenchmarkDirectCall 0.591 ns/op +0.0008 ns/op / +0.1% (worse)
Windows MinGW ARM64 BenchmarkGlobalRead 0.884 ns/op -0.0006 ns/op / -0.1% (better)
Windows MinGW ARM64 BenchmarkGlobalWrite 0.590 ns/op +0.0001 ns/op / +0.01697% (worse)
Windows MinGW ARM64 BenchmarkGoroutine 58931 ns/op +77 ns/op / +0.1% (worse)
Windows MinGW ARM64 BenchmarkInterfaceCall 4.215 ns/op +0.01 ns/op / +0.2% (worse)
Windows MinGW ARM64 BenchmarkRuntimeGetG 2.255 ns/op +0.449 ns/op / +24.9% (worse)
Windows MSVC BenchmarkLookupPCRandom 12.480 ns/op +0.16 ns/op / +1.3% (worse)
Windows MSVC BenchmarkMergeCompilerFlags 529.200 ns/op -18 ns/op / -3.3% (better)
Windows MSVC BenchmarkMergeLinkerFlags 455.400 ns/op -13.1 ns/op / -2.8% (better)
Windows MSVC BenchmarkChannelBuffered 31.720 ns/op -0.36 ns/op / -1.1% (better)
Windows MSVC BenchmarkChannelHandoff 1291 ns/op -45 ns/op / -3.4% (better)
Windows MSVC BenchmarkDefer 55.230 ns/op +0.45 ns/op / +0.8% (worse)
Windows MSVC BenchmarkDirectCall 1.747 ns/op -0.001 ns/op / -0.1% (better)
Windows MSVC BenchmarkGlobalRead 1.747 ns/op -0.001 ns/op / -0.1% (better)
Windows MSVC BenchmarkGlobalWrite 2.787 ns/op -0.002 ns/op / -0.1% (better)
Windows MSVC BenchmarkGoroutine 66221 ns/op +1663 ns/op / +2.6% (worse)
Windows MSVC BenchmarkInterfaceCall 8.396 ns/op -0.249 ns/op / -2.9% (better)
Windows MSVC BenchmarkRuntimeGetG 2.452 ns/op +0.004 ns/op / +0.2% (worse)
Windows MSVC 386 BenchmarkLookupPCRandom 26.560 ns/op +0.09 ns/op / +0.3% (worse)
Windows MSVC 386 BenchmarkMergeCompilerFlags 771.800 ns/op +27 ns/op / +3.6% (worse)
Windows MSVC 386 BenchmarkMergeLinkerFlags 696.200 ns/op +13.2 ns/op / +1.9% (worse)
Windows MSVC 386 BenchmarkChannelBuffered 39.280 ns/op +0.14 ns/op / +0.4% (worse)
Windows MSVC 386 BenchmarkChannelHandoff 809.100 ns/op -79.7 ns/op / -9.0% (better)
Windows MSVC 386 BenchmarkDefer 45.360 ns/op -2.05 ns/op / -4.3% (better)
Windows MSVC 386 BenchmarkDirectCall 1.860 ns/op -0.002 ns/op / -0.1% (better)
Windows MSVC 386 BenchmarkGlobalRead 1.867 ns/op +0.003 ns/op / +0.2% (worse)
Windows MSVC 386 BenchmarkGlobalWrite 7.797 ns/op -0.011 ns/op / -0.1% (better)
Windows MSVC 386 BenchmarkGoroutine 89802 ns/op +123 ns/op / +0.1% (worse)
Windows MSVC 386 BenchmarkInterfaceCall 8.230 ns/op -0.02 ns/op / -0.2% (better)
Windows MSVC 386 BenchmarkRuntimeGetG 1.935 ns/op +0.001 ns/op / +0.1% (worse)
Windows MSVC ARM64 BenchmarkLookupPCRandom 12 ns/op -0.05 ns/op / -0.4% (better)
Windows MSVC ARM64 BenchmarkMergeCompilerFlags 562.100 ns/op -71.8 ns/op / -11.3% (better)
Windows MSVC ARM64 BenchmarkMergeLinkerFlags 527.200 ns/op -51.4 ns/op / -8.9% (better)
Windows MSVC ARM64 BenchmarkChannelBuffered 38.940 ns/op +1.23 ns/op / +3.3% (worse)
Windows MSVC ARM64 BenchmarkChannelHandoff 1919 ns/op +114 ns/op / +6.3% (worse)
Windows MSVC ARM64 BenchmarkDefer 63.780 ns/op +0.45 ns/op / +0.7% (worse)
Windows MSVC ARM64 BenchmarkDirectCall 0.590 ns/op -0.0001 ns/op / -0.01696% (better)
Windows MSVC ARM64 BenchmarkGlobalRead 0.885 ns/op +0.0004 ns/op / +0.04523% (worse)
Windows MSVC ARM64 BenchmarkGlobalWrite 3.764 ns/op +0.019 ns/op / +0.5% (worse)
Windows MSVC ARM64 BenchmarkGoroutine 54244 ns/op +1463 ns/op / +2.8% (worse)
Windows MSVC ARM64 BenchmarkInterfaceCall 4.140 ns/op -0.001 ns/op / -0.02415% (better)
Windows MSVC ARM64 BenchmarkRuntimeGetG 1.808 ns/op +0.017 ns/op / +0.9% (worse)
Timer runtime benchmarks
Platform Operation and runtime ns/op vs base
Linux AfterFuncZeroDelivery/Go 898.500 ns/op -6.4 ns/op / -0.7% (better)
Linux AfterFuncZeroDelivery/LLGo 39168 ns/op +3886 ns/op / +11.0% (worse)
Linux CreateStop/Go 290.800 ns/op +0.4 ns/op / +0.1% (worse)
Linux CreateStop/LLGo 1820 ns/op +247 ns/op / +15.7% (worse)
Linux RearmStopped/Go 115.100 ns/op +0.4 ns/op / +0.3% (worse)
Linux RearmStopped/LLGo 1498 ns/op +200 ns/op / +15.4% (worse)
Linux ResetActive/Go 67.720 ns/op +0.21 ns/op / +0.3% (worse)
Linux ResetActive/LLGo 654.400 ns/op -527.6 ns/op / -44.6% (better)
Linux ResetHeap1024/Go 67.180 ns/op +0.04 ns/op / +0.1% (worse)
Linux ResetHeap1024/LLGo 175 ns/op +1 ns/op / +0.6% (worse)
macOS AfterFuncZeroDelivery/Go 406.100 ns/op -161.7 ns/op / -28.5% (better)
macOS AfterFuncZeroDelivery/LLGo 63243 ns/op -37224 ns/op / -37.1% (better)
macOS CreateStop/Go 126.900 ns/op -56.4 ns/op / -30.8% (better)
macOS CreateStop/LLGo 498 ns/op -375.7 ns/op / -43.0% (better)
macOS RearmStopped/Go 55.210 ns/op -16.01 ns/op / -22.5% (better)
macOS RearmStopped/LLGo 335.500 ns/op -199.1 ns/op / -37.2% (better)
macOS ResetActive/Go 41.250 ns/op -8.97 ns/op / -17.9% (better)
macOS ResetActive/LLGo 157.400 ns/op -61 ns/op / -27.9% (better)
macOS ResetHeap1024/Go 40.660 ns/op -12.86 ns/op / -24.0% (better)
macOS ResetHeap1024/LLGo 83.700 ns/op -44 ns/op / -34.5% (better)
Windows MinGW AfterFuncZeroDelivery/Go 573.300 ns/op +0.6 ns/op / +0.1% (worse)
Windows MinGW AfterFuncZeroDelivery/LLGo 170133 ns/op +1490 ns/op / +0.9% (worse)
Windows MinGW CreateStop/Go 116.300 ns/op -1.6 ns/op / -1.4% (better)
Windows MinGW CreateStop/LLGo 458.600 ns/op +30.6 ns/op / +7.1% (worse)
Windows MinGW RearmStopped/Go 31.240 ns/op -0.18 ns/op / -0.6% (better)
Windows MinGW RearmStopped/LLGo 271.900 ns/op -1.8 ns/op / -0.7% (better)
Windows MinGW ResetActive/Go 20.120 ns/op -0.03 ns/op / -0.1% (better)
Windows MinGW ResetActive/LLGo 274.200 ns/op +122.1 ns/op / +80.3% (worse)
Windows MinGW ResetHeap1024/Go 20.400 ns/op -0.06 ns/op / -0.3% (better)
Windows MinGW ResetHeap1024/LLGo 129.600 ns/op +6.4 ns/op / +5.2% (worse)
Windows MinGW 386 AfterFuncZeroDelivery/Go 939.300 ns/op -25.4 ns/op / -2.6% (better)
Windows MinGW 386 AfterFuncZeroDelivery/LLGo 190338 ns/op +679 ns/op / +0.4% (worse)
Windows MinGW 386 CreateStop/Go 189 ns/op -4.7 ns/op / -2.4% (better)
Windows MinGW 386 CreateStop/LLGo 494.800 ns/op -24 ns/op / -4.6% (better)
Windows MinGW 386 RearmStopped/Go 63.580 ns/op +0.61 ns/op / +1.0% (worse)
Windows MinGW 386 RearmStopped/LLGo 339.600 ns/op -4.7 ns/op / -1.4% (better)
Windows MinGW 386 ResetActive/Go 39 ns/op +0.11 ns/op / +0.3% (worse)
Windows MinGW 386 ResetActive/LLGo 977.400 ns/op +4.7 ns/op / +0.5% (worse)
Windows MinGW 386 ResetHeap1024/Go 39.370 ns/op +0.15 ns/op / +0.4% (worse)
Windows MinGW 386 ResetHeap1024/LLGo 187.300 ns/op -0.8 ns/op / -0.4% (better)
Windows MinGW ARM64 AfterFuncZeroDelivery/Go 669.400 ns/op -8 ns/op / -1.2% (better)
Windows MinGW ARM64 AfterFuncZeroDelivery/LLGo 137398 ns/op +7102 ns/op / +5.5% (worse)
Windows MinGW ARM64 CreateStop/Go 200.100 ns/op -2.6 ns/op / -1.3% (better)
Windows MinGW ARM64 CreateStop/LLGo 353.500 ns/op -8.3 ns/op / -2.3% (better)
Windows MinGW ARM64 RearmStopped/Go 70.690 ns/op +0.11 ns/op / +0.2% (worse)
Windows MinGW ARM64 RearmStopped/LLGo 249 ns/op -2.7 ns/op / -1.1% (better)
Windows MinGW ARM64 ResetActive/Go 30.870 ns/op -0.19 ns/op / -0.6% (better)
Windows MinGW ARM64 ResetActive/LLGo 119.700 ns/op -3.1 ns/op / -2.5% (better)
Windows MinGW ARM64 ResetHeap1024/Go 30.990 ns/op -0.1 ns/op / -0.3% (better)
Windows MinGW ARM64 ResetHeap1024/LLGo 127 ns/op -0.2 ns/op / -0.2% (better)
Windows MSVC AfterFuncZeroDelivery/Go 492.900 ns/op +13.5 ns/op / +2.8% (worse)
Windows MSVC AfterFuncZeroDelivery/LLGo 140451 ns/op +536 ns/op / +0.4% (worse)
Windows MSVC CreateStop/Go 115.400 ns/op -1.2 ns/op / -1.0% (better)
Windows MSVC CreateStop/LLGo 438.100 ns/op -30.2 ns/op / -6.4% (better)
Windows MSVC RearmStopped/Go 31.540 ns/op -0.06 ns/op / -0.2% (better)
Windows MSVC RearmStopped/LLGo 276.400 ns/op +1 ns/op / +0.4% (worse)
Windows MSVC ResetActive/Go 19.040 ns/op -0.04 ns/op / -0.2% (better)
Windows MSVC ResetActive/LLGo 162.800 ns/op +10.9 ns/op / +7.2% (worse)
Windows MSVC ResetHeap1024/Go 19.040 ns/op -0.31 ns/op / -1.6% (better)
Windows MSVC ResetHeap1024/LLGo 131.700 ns/op +0.8 ns/op / +0.6% (worse)
Windows MSVC 386 AfterFuncZeroDelivery/Go 964.800 ns/op +9.9 ns/op / +1.0% (worse)
Windows MSVC 386 AfterFuncZeroDelivery/LLGo 185327 ns/op -5954 ns/op / -3.1% (better)
Windows MSVC 386 CreateStop/Go 196.800 ns/op +1.7 ns/op / +0.9% (worse)
Windows MSVC 386 CreateStop/LLGo 478.500 ns/op -15.4 ns/op / -3.1% (better)
Windows MSVC 386 RearmStopped/Go 63.510 ns/op -0.06 ns/op / -0.1% (better)
Windows MSVC 386 RearmStopped/LLGo 321.600 ns/op -13 ns/op / -3.9% (better)
Windows MSVC 386 ResetActive/Go 39.070 ns/op +0.1 ns/op / +0.3% (worse)
Windows MSVC 386 ResetActive/LLGo 974.700 ns/op +38.8 ns/op / +4.1% (worse)
Windows MSVC 386 ResetHeap1024/Go 39.620 ns/op +0.16 ns/op / +0.4% (worse)
Windows MSVC 386 ResetHeap1024/LLGo 171.300 ns/op -0.2 ns/op / -0.1% (better)
Windows MSVC ARM64 AfterFuncZeroDelivery/Go 659.600 ns/op -16.4 ns/op / -2.4% (better)
Windows MSVC ARM64 AfterFuncZeroDelivery/LLGo 128169 ns/op +9493 ns/op / +8.0% (worse)
Windows MSVC ARM64 CreateStop/Go 195.800 ns/op +2.1 ns/op / +1.1% (worse)
Windows MSVC ARM64 CreateStop/LLGo 462 ns/op +24.4 ns/op / +5.6% (worse)
Windows MSVC ARM64 RearmStopped/Go 70.580 ns/op -0.07 ns/op / -0.1% (better)
Windows MSVC ARM64 RearmStopped/LLGo 274.800 ns/op -1.6 ns/op / -0.6% (better)
Windows MSVC ARM64 ResetActive/Go 31 ns/op -0.06 ns/op / -0.2% (better)
Windows MSVC ARM64 ResetActive/LLGo 139.900 ns/op -6.6 ns/op / -4.5% (better)
Windows MSVC ARM64 ResetHeap1024/Go 31.070 ns/op -0.06 ns/op / -0.2% (better)
Windows MSVC ARM64 ResetHeap1024/LLGo 137.900 ns/op -0.2 ns/op / -0.1% (better)

Compared with be496b2cc5c3 measured in the same runner job.

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LLGo WebAssembly build benchmarks

b969914fe900 | workflow run | long-term charts

WebAssembly output sizes
Example, profile and compiler Wasm module vs base Generated JS glue vs base
cprintf/j32-emscripten/LLGo 135610 B 0 B / +0.0% 70901 B 0 B / +0.0%
cprintf/j32-goos-js/LLGo 134108 B 0 B / +0.0% 69235 B 0 B / +0.0%
cprintf/j64-emscripten-memory64/LLGo 124046 B 0 B / +0.0% 74134 B 0 B / +0.0%
cprintf/w32-goos-wasip1/LLGo 138444 B 0 B / +0.0% 0 B 0 B / 0.0%
cprintf/w32-wasi/LLGo 138170 B 0 B / +0.0% 0 B 0 B / 0.0%
fmtprintf/j32-emscripten/LLGo 3087288 B 0 B / +0.0% 115325 B 0 B / +0.0%
fmtprintf/j32-goos-js/Go 2526852 B 0 B / +0.0% 0 B 0 B / 0.0%
fmtprintf/j32-goos-js/LLGo 3082171 B 0 B / +0.0% 98999 B 0 B / +0.0%
fmtprintf/j64-emscripten-memory64/LLGo 2826659 B 0 B / +0.0% 122264 B 0 B / +0.0%
fmtprintf/w32-goos-wasip1/Go 2500019 B 0 B / +0.0% 0 B 0 B / 0.0%
fmtprintf/w32-goos-wasip1/LLGo 2827999 B 0 B / +0.0% 0 B 0 B / 0.0%
fmtprintf/w32-wasi/LLGo 2694467 B 0 B / +0.0% 0 B 0 B / 0.0%
j32-emscripten/LLGo 134897 B 0 B / +0.0% 70901 B 0 B / +0.0%
j32-goos-js/Go 1895533 B 0 B / +0.0% 0 B 0 B / 0.0%
j32-goos-js/LLGo 133563 B 0 B / +0.0% 69235 B 0 B / +0.0%
j64-emscripten-memory64/LLGo 123371 B 0 B / +0.0% 74134 B 0 B / +0.0%
reflectcall/j32-emscripten/LLGo 1479250 B 0 B / +0.0% 89361 B 0 B / +0.0%
reflectcall/j32-goos-js/Go 2191221 B 0 B / +0.0% 0 B 0 B / 0.0%
reflectcall/j32-goos-js/LLGo 1482639 B 0 B / +0.0% 87695 B 0 B / +0.0%
reflectcall/j64-emscripten-memory64/LLGo 1366522 B 0 B / +0.0% 94654 B 0 B / +0.0%
reflectcall/w32-goos-wasip1/Go 2205707 B 0 B / +0.0% 0 B 0 B / 0.0%
reflectcall/w32-goos-wasip1/LLGo 1533364 B 0 B / +0.0% 0 B 0 B / 0.0%
reflectcall/w32-wasi/LLGo 1458829 B 0 B / +0.0% 0 B 0 B / 0.0%
w32-goos-wasip1/Go 1909947 B 0 B / +0.0% 0 B 0 B / 0.0%
w32-goos-wasip1/LLGo 137725 B 0 B / +0.0% 0 B 0 B / 0.0%
w32-wasi/LLGo 137518 B 0 B / +0.0% 0 B 0 B / 0.0%
LLGo WebAssembly build measurements
Example and profile Build vs base
j32-emscripten 5.320 s -99.47 ms / -1.8% (better)
j32-goos-js 5.538 s +54.03 ms / +1.0% (worse)
j64-emscripten-memory64 4.745 s +15.92 ms / +0.3% (worse)
reflectcall/w32-wasi 24.953 s -1.352 s / -5.1% (better)
w32-goos-wasip1 4.431 s -107.3 ms / -2.4% (better)
w32-wasi 4.577 s +171.1 ms / +3.9% (worse)

Compared with be496b2cc5c3 measured in the same runner job.

@cpunion cpunion changed the title build/wasm: select one Binaryen installation for Emscripten and WASI build/wasm: pin one LLGo Binaryen release for Emscripten and WASI Sep 23, 2026
This was referenced Sep 23, 2026
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@cpunion cpunion mentioned this pull request Sep 24, 2026
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@cpunion
cpunion merged commit 6cc9923 into xgo-dev:main Sep 26, 2026
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