Kotlin Multiplatform: Compose code as a Codename One app by shai-almog · Pull Request #6106 · codenameone/CodenameOne

shai-almog · 2026-10-25T19:12:55Z

A Kotlin Multiplatform module's commonMain builds as a Codename One application for every target. kotlinc compiles it for the JVM with the Compose compiler plugin. The Compose runtime and kotlinx.coroutines ship unmodified, and maven/compose-compat replaces only the UI layer, writing it over Codename One components.

Benchmarks

The same commonMain was built both ways and run on the iPhone 17 Pro simulator (scripts/kmp-bench).

	Codename One	Compose Multiplatform
Executable, stripped	16.4 MB	22.9 MB
App bundle	27.3 MB	28.8 MB
Physical footprint	47-48 MB	48 MB
Start-up	596-685 ms	646-794 ms

For reference, an empty UIKit app measures 34 MB and starts in 640-750 ms on the same simulator.

What's included

Compose UI layer (compose-compat): layout policies, modifiers, text, material3 and animation. LazyColumn and LazyRow compose only the items in view. The top app bar and navigation bar now pad by the part of the safe area their host actually lies under, so the bar no longer draws under the status bar.
Import and build: cn1:import-kmp-project, a compose profile in the archetype, and Gradle support. Gradle stops with the line to add if the Compose plugin isn't applied, and convert-to-gradle writes that line.
ParparVM: field updaters are lowered at translate time, ServiceLoader resolves through a registry built at translate time, and JavaAPI gains the classes the Compose runtime and coroutines need.
Memory: loading the theme no longer leaves 24k strings behind (ThemeStrings), and Font.derive finds a cached font without building a key. Live heap drops from 3.7 MB to 3.2 MB, and footprint by about 2 MB.
hellocodenameone: moves from Kotlin 1.6 to 2.2.10, with four KmpCompat* screenshot tests covering layout, typography, lists and state/animation. Their goldens get seeded on CI.
Docs: a new developer guide chapter, "Running Kotlin Multiplatform and Compose applications", with a build-pipeline diagram, a runtime-layers diagram, the benchmark chart and a side-by-side screenshot.

Verified locally

core-unittests: 8161 tests pass, SpotBugs reports 0 findings.
compose-compat: tests pass, SpotBugs reports 0 findings.
Vale is clean on the new chapter.
iOS simulator: the layout now matches the CMP build.

LanguageTool and the screenshot suites were not run locally; they run on CI.

🤖 Generated with Claude Code

A KMP module's commonMain (and its JVM source set) builds as a Codename One application: kotlinc compiles it for the JVM with the Compose compiler plugin, the unmodified Compose runtime and kotlinx.coroutines ship as they are, and maven/compose-compat provides the UI layer over Codename One components. - compose-compat: Modifier chains, Box/Row/Column/Lazy layout policies, text, material3, animation; top and navigation bars pad by the part of the safe area their host lies under, read at measure time. - cn1:import-kmp-project, the archetype compose profile, Gradle support. - ParparVM: field updaters lowered at translate time, ServiceLoader registry, the JavaAPI classes the Compose runtime and coroutines need. - Theme loading no longer leaves 24k strings behind (ThemeStrings), and Font.derive finds a cached font without building a key. - hellocodenameone moves to Kotlin 2.2.10 and carries KmpCompat screenshot tests; scripts/kmp-bench compares the same source against Compose Multiplatform; new developer guide chapter with diagrams. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-25T19:21:44Z

Compared 12 screenshots: 12 matched.
✅ JavaSE simulator integration screenshots matched stored baselines.

shai-almog · 2026-10-25T19:29:39Z

Native fidelity (Android, Material 3)

54 pairs compared -- median 95.6%, worst 91.3% (FlatButton_pressed_dark), 25th pct 94.9%, mean 95.7%.

Distribution -- >=99%: 2 | 95-99%: 37 | 90-95%: 15 | <90%: 0

Component	State	Appearance	Material	Fidelity	SSIM	mean delta	Geometry
FlatButton	pressed	dark	normal	91.3%	0.899	3.10	ok
Tabs	normal	light	normal	92.3%	0.914	3.05	ok
Button	pressed	dark	normal	92.6%	0.949	4.32	ok
FlatButton	normal	dark	normal	93.2%	0.938	2.69	ok
Button	disabled	dark	normal	93.3%	0.928	2.20	ok
Button	pressed	light	normal	93.3%	0.952	3.68	ok
FlatButton	normal	light	normal	93.7%	0.941	2.29	ok
FlatButton	pressed	light	normal	93.8%	0.942	2.56	ok
FloatingActionButton	pressed	light	normal	94.4%	0.927	2.82	OFF (h 0.88)
RadioButton	normal	dark	normal	94.5%	0.963	2.19	ok
RadioButton	normal	light	normal	94.7%	0.964	1.85	ok
CheckBox	selected	dark	normal	94.7%	0.950	2.60	ok
RadioButton	selected	dark	normal	94.8%	0.963	2.42	ok
CheckBox	normal	dark	normal	94.9%	0.952	2.69	ok
Button	normal	dark	normal	94.9%	0.949	3.16	ok
CheckBox	normal	light	normal	95.0%	0.953	2.30	ok
Toolbar	normal	dark	normal	95.1%	0.906	1.60	ok
RaisedButton	pressed	dark	normal	95.2%	0.950	2.39	ok
CheckBox	disabled	dark	normal	95.2%	0.954	1.47	ok
CheckBox	disabled	light	normal	95.2%	0.956	1.34	ok
Tabs	normal	dark	normal	95.2%	0.913	3.65	ok
RadioButton	disabled	dark	normal	95.3%	0.963	1.18	ok
RadioButton	selected	light	normal	95.3%	0.964	1.84	ok
CheckBox	selected	light	normal	95.4%	0.952	2.06	ok
Switch	selected	light	normal	95.4%	0.966	1.59	ok
Switch	selected	dark	normal	95.5%	0.966	1.86	ok
RadioButton	disabled	light	normal	95.5%	0.966	1.08	ok
Switch	disabled	dark	normal	95.6%	0.961	0.85	ok
Dialog	normal	light	normal	95.7%	0.930	2.30	ok
RaisedButton	pressed	light	normal	95.8%	0.958	2.16	ok
Button	normal	light	normal	95.8%	0.953	2.46	ok
Dialog	normal	dark	normal	95.8%	0.932	2.30	ok
Switch	normal	light	normal	96.0%	0.961	1.45	ok
FloatingActionButton	normal	light	normal	96.1%	0.937	1.14	ok
FloatingActionButton	pressed	dark	normal	96.2%	0.951	2.45	ok
Switch	normal	dark	normal	96.2%	0.962	1.39	ok
TextField	disabled	dark	normal	96.2%	0.965	0.76	ok
RaisedButton	normal	dark	normal	96.4%	0.952	1.78	ok
Switch	disabled	light	normal	96.4%	0.970	0.61	ok
Button	disabled	light	normal	96.8%	0.960	1.06	ok
ProgressBar	normal	dark	normal	96.9%	0.967	2.03	OFF (h 1.50)
RaisedButton	disabled	dark	normal	97.0%	0.955	0.89	ok
FloatingActionButton	normal	dark	normal	97.1%	0.952	1.43	ok
ProgressBar	normal	light	normal	97.3%	0.974	1.53	OFF (h 1.50)
RaisedButton	disabled	light	normal	97.3%	0.961	0.79	ok
TextField	disabled	light	normal	97.3%	0.965	0.79	ok
RaisedButton	normal	light	normal	97.3%	0.961	1.40	ok
TextField	normal	dark	normal	97.6%	0.958	1.83	ok
TextField	normal	light	normal	97.6%	0.958	1.63	ok
Slider	normal	dark	normal	98.4%	0.990	0.87	ok
Toolbar	normal	light	normal	98.7%	0.974	1.28	ok
Slider	normal	light	normal	99.0%	0.991	0.47	ok
Slider	disabled	dark	normal	99.6%	0.993	0.22	ok
Slider	disabled	light	normal	99.6%	0.993	0.18	ok

Geometry vs native (bbox offset / size ratio / center offset / corner radius) -- gated separately from the visual score

Component	State	Appearance	bbox dx,dy (px)	w ratio	h ratio	center off (px)	radius native->cn1 (px)
FloatingActionButton	pressed	light	+0,+0	0.929	0.881	4.0	-
FloatingActionButton	normal	light	+0,+0	0.946	0.912	2.9	-
Button	pressed	dark	+0,+0	0.947	0.975	2.6	-
Button	disabled	dark	+0,+0	0.947	0.975	2.6	-
Button	pressed	light	+0,+0	0.947	0.975	2.6	-
Button	normal	dark	+0,+0	0.947	0.975	2.6	-
RaisedButton	pressed	dark	+0,+0	0.945	0.975	2.6	-
RaisedButton	pressed	light	+0,+0	0.945	0.975	2.6	-
Button	normal	light	+0,+0	0.947	0.975	2.6	-
RaisedButton	normal	dark	+0,+0	0.945	0.975	2.6	-
Button	disabled	light	+0,+0	0.947	0.975	2.6	-
RaisedButton	disabled	dark	+0,+0	0.945	0.975	2.6	-
RaisedButton	disabled	light	+0,+0	0.945	0.975	2.6	-
RaisedButton	normal	light	+0,+0	0.945	0.975	2.6	-
RadioButton	normal	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	normal	light	+1,+1	1.029	1.000	2.2	-
RadioButton	selected	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	disabled	dark	+1,+1	1.029	1.000	2.2	-
RadioButton	selected	light	+1,+1	1.029	1.000	2.2	-
Switch	selected	light	+0,+0	1.080	1.063	2.2	-
RadioButton	disabled	light	+1,+1	1.029	1.000	2.2	-
CheckBox	selected	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	normal	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	normal	light	+1,+1	1.013	1.000	1.8	-
CheckBox	disabled	dark	+1,+1	1.013	1.000	1.8	-
CheckBox	disabled	light	+1,+1	1.013	1.000	1.8	-
CheckBox	selected	light	+1,+1	1.013	1.000	1.8	-
Switch	selected	dark	+0,+0	1.060	1.031	1.6	-
Switch	disabled	dark	+0,-1	1.060	1.031	1.6	-
Dialog	normal	light	+0,+0	1.007	0.982	1.6	-
Dialog	normal	dark	+0,+0	1.007	0.982	1.6	-
Switch	normal	light	+0,-1	1.060	1.031	1.6	-
Switch	normal	dark	+0,-1	1.060	1.031	1.6	-
Switch	disabled	light	+0,-1	1.060	1.031	1.6	-
FloatingActionButton	pressed	dark	+0,+0	0.963	0.963	1.4	-
FloatingActionButton	normal	dark	+0,+0	0.963	0.963	1.4	-
Toolbar	normal	light	-1,+1	1.000	1.000	1.4	-
FlatButton	pressed	dark	+0,+0	0.977	0.975	1.1	-
FlatButton	normal	dark	+0,+0	0.977	0.975	1.1	-
FlatButton	normal	light	+0,+0	0.977	0.975	1.1	-
FlatButton	pressed	light	+0,+0	0.977	0.975	1.1	-
TextField	normal	dark	+0,+0	1.015	1.036	1.1	-
TextField	normal	light	+0,+0	1.015	1.036	1.1	-
Toolbar	normal	dark	+0,+0	1.000	1.032	1.0	-
ProgressBar	normal	dark	+0,+0	1.000	1.500	1.0	-
ProgressBar	normal	light	+0,+0	1.000	1.500	1.0	-
TextField	disabled	dark	+0,+0	1.015	1.018	0.7	-
TextField	disabled	light	+0,+0	1.015	1.018	0.7	-
Tabs	normal	light	+0,+1	1.000	0.984	0.5	-
Slider	normal	dark	+1,+0	0.996	1.000	0.5	-
Slider	normal	light	+1,+0	0.996	1.000	0.5	-
Tabs	normal	dark	+0,+0	1.000	1.000	0.0	-
Slider	disabled	dark	+0,+0	1.000	1.000	0.0	-
Slider	disabled	light	+0,+0	1.000	1.000	0.0	-

Side-by-side comparisons (worst first)

FlatButton_pressed_dark -- 91.25% fidelity (SSIM 0.8985) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_light -- 92.28% fidelity (SSIM 0.9140) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_dark -- 92.61% fidelity (SSIM 0.9485) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_dark -- 93.24% fidelity (SSIM 0.9381) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_dark -- 93.26% fidelity (SSIM 0.9278) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_light -- 93.34% fidelity (SSIM 0.9521) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_light -- 93.72% fidelity (SSIM 0.9410) (no change)

Left: native widget. Right: Codename One render.
FlatButton_pressed_light -- 93.77% fidelity (SSIM 0.9424) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_pressed_light -- 94.44% fidelity (SSIM 0.9273) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_dark -- 94.46% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_light -- 94.69% fidelity (SSIM 0.9643) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_dark -- 94.71% fidelity (SSIM 0.9502) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_dark -- 94.79% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_dark -- 94.93% fidelity (SSIM 0.9516) (no change)

Left: native widget. Right: Codename One render.
Button_normal_dark -- 94.94% fidelity (SSIM 0.9491) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_light -- 95.03% fidelity (SSIM 0.9531) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_dark -- 95.07% fidelity (SSIM 0.9059) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_dark -- 95.19% fidelity (SSIM 0.9501) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_dark -- 95.20% fidelity (SSIM 0.9538) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_light -- 95.21% fidelity (SSIM 0.9562) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_dark -- 95.23% fidelity (SSIM 0.9125) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_dark -- 95.29% fidelity (SSIM 0.9630) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_light -- 95.33% fidelity (SSIM 0.9642) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_light -- 95.37% fidelity (SSIM 0.9524) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_light -- 95.37% fidelity (SSIM 0.9658) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_dark -- 95.45% fidelity (SSIM 0.9656) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_light -- 95.46% fidelity (SSIM 0.9657) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_dark -- 95.57% fidelity (SSIM 0.9613) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_light -- 95.65% fidelity (SSIM 0.9300) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_light -- 95.78% fidelity (SSIM 0.9578) (no change)

Left: native widget. Right: Codename One render.
Button_normal_light -- 95.79% fidelity (SSIM 0.9528) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_dark -- 95.79% fidelity (SSIM 0.9322) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_light -- 95.97% fidelity (SSIM 0.9612) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_normal_light -- 96.09% fidelity (SSIM 0.9367) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_pressed_dark -- 96.16% fidelity (SSIM 0.9513) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_dark -- 96.17% fidelity (SSIM 0.9616) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_dark -- 96.21% fidelity (SSIM 0.9648) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_dark -- 96.41% fidelity (SSIM 0.9516) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_light -- 96.43% fidelity (SSIM 0.9698) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_light -- 96.80% fidelity (SSIM 0.9596) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_dark -- 96.91% fidelity (SSIM 0.9669) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_dark -- 97.02% fidelity (SSIM 0.9549) (no change)

Left: native widget. Right: Codename One render.
FloatingActionButton_normal_dark -- 97.07% fidelity (SSIM 0.9521) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_light -- 97.26% fidelity (SSIM 0.9739) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_light -- 97.26% fidelity (SSIM 0.9611) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_light -- 97.29% fidelity (SSIM 0.9649) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_light -- 97.32% fidelity (SSIM 0.9613) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_dark -- 97.61% fidelity (SSIM 0.9583) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_light -- 97.62% fidelity (SSIM 0.9582) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_dark -- 98.39% fidelity (SSIM 0.9900) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_light -- 98.69% fidelity (SSIM 0.9739) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_light -- 98.95% fidelity (SSIM 0.9908) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_dark -- 99.56% fidelity (SSIM 0.9927) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_light -- 99.59% fidelity (SSIM 0.9932) (no change)

Left: native widget. Right: Codename One render.

… reactor; guide snippets by tag Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

github-actions · 2026-10-25T19:46:40Z

Flutter vs Codename One

Same application, built both ways: Flutter's AOT compile of the gallery, and the identical Dart source transpiled to Java on Codename One. Lower is better for every metric, so a ratio above 1.00x means Codename One is ahead by that factor.

android

9 interleaved rounds; host load 0.41, 1.38, 1.06

Metric	Codename One	Flutter	Ratio	Winner
Installed size	78.2 MB	95.8 MB	1.22x	Codename One
Executable code	4.7 MB	20.6 MB	4.41x	Codename One
Download size (zipped)	78.2 MB	95.8 MB	1.22x	Codename One
Cold start to first frame on screen	310 ms	1082 ms	3.44x	Codename One
Memory at rest	46.1 MB	80.8 MB	1.74x	Codename One

Start-up and memory at rest are judged round by round: the ratio is the median of the per-round ratios, each from two launches made back to back, and the times and sizes shown are each side's median, so the ratio need not equal their quotient. Codename One was ahead in 9 of 9 rounds on cold start to first frame on screen; 9 of 9 rounds on memory at rest.

Compute -- the VM workloads (vm/benchmarks), run inside each app; time is the best of the app's own repetitions, higher ratio means Codename One is faster.

Workload	Codename One	Flutter	Ratio
intArithmetic	55 ms	117 ms	2.13x
longArithmetic	34 ms	34 ms	1.00x
mathTranscendental	157 ms	192 ms	1.22x
arraySequential	18 ms	20 ms	1.11x
arrayRandom	187 ms	208 ms	1.11x
objectAllocation	54 ms	23 ms	0.43x
valueEscape	5 ms	5 ms	1.00x
hashMapChurn	103 ms	173 ms	1.68x
stringBuilding	53 ms	74 ms	1.40x
recursion	41 ms	166 ms	4.05x
quicksortBench	99 ms	113 ms	1.14x
Geometric mean			1.28x

Gate: within tolerance against scripts/flutter-bench/baseline.

Android sizes are for the arm64-v8a slice a phone is delivered, on both sides; Flutter's release apk carries three ABIs and would otherwise count its engine about three times.
Android start-up and memory come from an x86_64 emulator with a software GPU. They compare the two runtimes on one machine; they are not phone timings, and a renderer that leans on the GPU is penalised more there.
This platform's adapter has not been exercised end to end before; treat the first published run as the thing under review.

ios

9 interleaved rounds; host load 12.5, 17.95, 22.18

Metric	Codename One	Flutter	Ratio	Winner
Installed size	108.3 MB	110.5 MB	1.02x	Codename One
Executable code	17.3 MB	19.1 MB	1.10x	Codename One
Download size (zipped)	79.9 MB	81.9 MB	1.02x	Codename One
Cold start to first frame on screen	--	--	--	not measured
Memory at rest	--	--	--	not measured

Compute -- the VM workloads (vm/benchmarks), run inside each app; time is the best of the app's own repetitions, higher ratio means Codename One is faster.

Not measured: iOS compute is not measured: a device build needs signed hardware, and on the simulator Flutter runs its JIT debug engine rather than AOT code. The macOS row runs the same ParparVM and Dart AOT compilers on the same Apple silicon.

Gate: within tolerance against scripts/flutter-bench/baseline. Smaller than its baseline, which does not fail the gate: Executable code -6.58% -- rebaseline to tighten. To accept the move, download this platform's baseline-<platform>.json artifact and run python3 scripts/flutter-bench/flutter_baseline.py calibrate --pr 6106 --reason "<why these moved>" baseline-ios.json, then commit the overlay it writes.

iOS start-up and memory are not measured here: Flutter cannot AOT-compile for the simulator, so a simulator run would time a JIT debug build against a release build. Sizes come from release device bundles; timings need signed hardware.
This platform's adapter has not been exercised end to end before; treat the first published run as the thing under review.

javascript

9 interleaved rounds; host load 2.14, 1.36, 0.6

Metric	Codename One	Flutter	Ratio	Winner
Installed size	104.0 MB	122.5 MB	1.18x	Codename One
Executable code	12.9 MB	25.2 MB	1.95x	Codename One
Download size (zipped)	76.3 MB	84.1 MB	1.10x	Codename One
Cold start to first frame on screen	--	--	--	not measured
Memory at rest	--	--	--	not measured

Compute -- the VM workloads (vm/benchmarks), run inside each app; time is the best of the app's own repetitions, higher ratio means Codename One is faster.

Workload	Codename One	Flutter	Ratio
intArithmetic	694 ms	wrong result	Flutter: wrong result
longArithmetic	5058 ms	did not run	Flutter: did not run
mathTranscendental	379 ms	did not run	Flutter: did not run
arraySequential	223 ms	78 ms	0.35x
arrayRandom	763 ms	wrong result	Flutter: wrong result
objectAllocation	74 ms	22 ms	0.30x
valueEscape	124 ms	7 ms	0.06x
hashMapChurn	891 ms	232 ms	0.26x
stringBuilding	414 ms	90 ms	0.22x
recursion	463 ms	356 ms	0.77x
quicksortBench	450 ms	wrong result	Flutter: wrong result
Geometric mean			0.25x

Gate: within tolerance against scripts/flutter-bench/baseline; BEHIND FLUTTER on Compute (geomean of the VM workloads) (reported, not gated: a loss to Flutter on the web is currently accepted).

the JavaScript adapter needs a Chrome DevTools driver; sizes are reported and timings are not
This platform's adapter has not been exercised end to end before; treat the first published run as the thing under review.

macos

9 interleaved rounds; host load 1.66, 7.03, 7.7

Metric	Codename One	Flutter	Ratio	Winner
Installed size	124.4 MB	139.4 MB	1.12x	Codename One
Executable code	33.3 MB	47.9 MB	1.44x	Codename One
Download size (zipped)	85.5 MB	93.3 MB	1.09x	Codename One
Cold start to first frame on screen	166 ms	242 ms	1.48x	Codename One
Memory at rest	34.9 MB	51.9 MB	1.49x	Codename One

Start-up and memory at rest are judged round by round: the ratio is the median of the per-round ratios, each from two launches made back to back, and the times and sizes shown are each side's median, so the ratio need not equal their quotient. Codename One was ahead in 9 of 9 rounds on cold start to first frame on screen; 9 of 9 rounds on memory at rest.

Compute -- the VM workloads (vm/benchmarks), run inside each app; time is the best of the app's own repetitions, higher ratio means Codename One is faster.

Workload	Codename One	Flutter	Ratio
intArithmetic	104 ms	236 ms	2.27x
longArithmetic	64 ms	63 ms	0.98x
mathTranscendental	262 ms	305 ms	1.16x
arraySequential	10 ms	39 ms	3.90x
arrayRandom	253 ms	287 ms	1.13x
objectAllocation	33 ms	26 ms	0.79x
valueEscape	5 ms	13 ms	2.60x
hashMapChurn	28 ms	149 ms	5.32x
stringBuilding	22 ms	98 ms	4.46x
recursion	117 ms	186 ms	1.59x
quicksortBench	113 ms	131 ms	1.16x
Geometric mean			1.88x

Gate: within tolerance against scripts/flutter-bench/baseline. Smaller than its baseline, which does not fail the gate: Executable code -5.72% -- rebaseline to tighten. To accept the move, download this platform's baseline-<platform>.json artifact and run python3 scripts/flutter-bench/flutter_baseline.py calibrate --pr 6106 --reason "<why these moved>" baseline-macos.json, then commit the overlay it writes.

This platform's adapter has not been exercised end to end before; treat the first published run as the thing under review.

windows

9 interleaved rounds

Metric	Codename One	Flutter	Ratio	Winner
Installed size	107.9 MB	121.1 MB	1.12x	Codename One
Executable code	11.3 MB	14.1 MB	1.25x	Codename One
Download size (zipped)	77.9 MB	86.4 MB	1.11x	Codename One
Cold start to first frame on screen	157 ms	257 ms	1.64x	Codename One
Memory at rest	56.2 MB	92.4 MB	1.64x	Codename One

Start-up and memory at rest are judged round by round: the ratio is the median of the per-round ratios, each from two launches made back to back, and the times and sizes shown are each side's median, so the ratio need not equal their quotient. Codename One was ahead in 9 of 9 rounds on cold start to first frame on screen; 9 of 9 rounds on memory at rest.

Compute -- the VM workloads (vm/benchmarks), run inside each app; time is the best of the app's own repetitions, higher ratio means Codename One is faster.

Workload	Codename One	Flutter	Ratio
intArithmetic	81 ms	183 ms	2.26x
longArithmetic	64 ms	57 ms	0.89x
mathTranscendental	198 ms	266 ms	1.34x
arraySequential	14 ms	35 ms	2.50x
arrayRandom	256 ms	368 ms	1.44x
objectAllocation	26 ms	40 ms	1.54x
valueEscape	1 ms	7 ms	7.00x
hashMapChurn	48 ms	339 ms	7.06x
stringBuilding	35 ms	124 ms	3.54x
recursion	204 ms	264 ms	1.29x
quicksortBench	142 ms	148 ms	1.04x
Geometric mean			2.10x

Gate: within tolerance against scripts/flutter-bench/baseline. Smaller than its baseline, which does not fail the gate: Executable code -11.03%; Download size (zipped) -0.78% -- rebaseline to tighten. To accept the move, download this platform's baseline-<platform>.json artifact and run python3 scripts/flutter-bench/flutter_baseline.py calibrate --pr 6106 --reason "<why these moved>" baseline-windows.json, then commit the overlay it writes.

This platform's adapter has not been exercised end to end before; treat the first published run as the thing under review.

Codename One wins 21 of 21 measured metrics across 5 platform(s).

github-actions · 2026-10-25T20:32:48Z

✅ Continuous Quality Report

Test & Coverage

✅ Tests: 14604 total, 0 failed, 161 skipped
📊 Line coverage: 65.01% [HTML preview] [Download]
- Lowest covered classes
  - com.codename1.io.zip.ZipArchiveOutputStream – 0.00%
  - com.codename1.gaming.level.GameSceneView – 0.00%
  - com.codename1.crash.CrashProtection – 0.00%
  - com.codename1.mapping.JsonValues – 0.00%
  - com.codename1.payment.CommerceManager – 0.00%
  - com.codename1.wearable.WearableMessage – 0.00%
  - com.codename1.ui.plaf.GlassLensBlend – 0.00%
  - com.codename1.vr.VRView – 0.00%
  - com.codename1.appreview.RatingDialog – 0.00%
  - com.codename1.db.ManagedKeys – 0.00%

Static Analysis

SpotBugs [Report archive]
- ✅ ByteCodeTranslator: 0 findings (no issues)
- ✅ android: 0 findings (no issues)
- ✅ android-compat: 0 findings (no issues)
- ✅ android-res-compiler: 0 findings (no issues)
- ✅ backend: 0 findings (no issues)
- ✅ backend-test: 0 findings (no issues)
- ✅ build-engine: 0 findings (no issues)
- ✅ build-hint-catalog: 0 findings (no issues)
- ✅ build-hint-tools: 0 findings (no issues)
- ✅ codenameone-gradle-plugin: 0 findings (no issues)
- ✅ codenameone-maven-plugin: 0 findings (no issues)
- ✅ compose-compat: 0 findings (no issues)
- ✅ core-unittests: 0 findings (no issues)
- ✅ desktop-compat-runtime: 0 findings (no issues)
- ✅ fxml-compiler: 0 findings (no issues)
- ✅ ios: 0 findings (no issues)
- ✅ javac: 0 findings (no issues)
- ✅ javafx-compat: 0 findings (no issues)
- ✅ project-model: 0 findings (no issues)
- ✅ swing-compat: 0 findings (no issues)
✅ PMD: 0 findings (no issues) [Report archive]
✅ Checkstyle: 0 findings (no issues) [Report archive]

Generated automatically by the PR CI workflow.

shai-almog · 2026-10-25T21:10:24Z

Native fidelity (ios-27-metal)

68 pairs compared -- median 94.6%, worst 74.5% (Toolbar_normal_dark), 25th pct 91.7%, mean 93.3%.

Distribution -- >=99%: 0 | 95-99%: 31 | 90-95%: 25 | <90%: 12

Component	State	Appearance	Material	Fidelity	SSIM	mean delta	vs base	Geometry
Toolbar	normal	dark	glass	74.5%	0.930	7.16	0.0	ok
Button	normal	dark	glass	79.3%	0.938	7.66	0.0	OFF (off 11px)
Button	disabled	dark	glass	79.6%	0.942	7.41	0.0	OFF (off 11px)
RaisedButton	disabled	dark	glass	81.2%	0.954	6.32	0.0	ok
Tabs	normal	dark	glass	86.2%	0.900	6.73	+0.3	ok
Button	pressed	dark	glass	86.3%	0.948	5.27	0.0	OFF (off 11px)
Tabs	normal	light	glass	86.4%	0.895	7.61	+0.3	ok
TextField	normal	light	normal	86.5%	0.950	3.38	0.0	ok
Toolbar	normal	light	glass	86.9%	0.949	3.85	0.0	ok
TextField	disabled	light	normal	89.4%	0.954	2.56	0.0	ok
Button	normal	light	glass	89.5%	0.959	4.54	0.0	OFF (off 11px)
Button	pressed	light	glass	89.5%	0.959	4.33	0.0	OFF (off 11px)
Spinner	normal	dark	normal	90.7%	0.880	3.47	0.0	ok
FlatButton	normal	dark	glass	90.9%	0.981	2.38	0.0	ok
Button	disabled	light	glass	91.6%	0.962	3.21	0.0	OFF (off 11px)
Spinner	normal	light	normal	91.6%	0.910	4.20	0.0	ok
CheckBox	normal	light	normal	91.7%	0.994	0.72	0.0	ok
RadioButton	normal	light	normal	91.7%	0.994	0.72	0.0	ok
Slider	disabled	dark	normal	92.1%	0.943	2.45	0.0	ok
Switch	selected	light	normal	92.1%	0.981	1.47	0.0	ok
CheckBox	disabled	light	normal	92.3%	0.995	0.52	0.0	ok
RadioButton	disabled	light	normal	92.3%	0.995	0.52	0.0	ok
FlatButton	pressed	dark	glass	92.4%	0.982	1.37	0.0	ok
RaisedButton	disabled	light	glass	92.4%	0.960	2.43	0.0	ok
Slider	normal	dark	normal	92.5%	0.944	2.63	0.0	ok
TabsGeom	normal	light	normal	93.1%	0.885	6.48	+0.1	OFF (off 6px)
FlatButton	pressed	light	glass	93.3%	0.981	1.90	0.0	ok
TabsGeom	normal	dark	normal	93.8%	0.893	4.47	+0.1	ok
FlatButton	normal	light	glass	93.9%	0.981	1.88	0.0	ok
Slider	disabled	light	normal	94.0%	0.963	1.75	0.0	OFF (h 4.50)
RaisedButton	pressed	dark	glass	94.1%	0.966	2.29	0.0	ok
RaisedButton	normal	dark	glass	94.1%	0.966	2.32	0.0	ok
RadioButton	selected	light	normal	94.3%	0.990	0.95	0.0	ok
RaisedButton	pressed	light	glass	94.5%	0.963	2.16	0.0	ok
GlassPanelPhoto	normal	dark	glass	94.6%	0.951	13.16	0.0	ok
RaisedButton	normal	light	glass	94.6%	0.963	2.17	0.0	ok
GlassPanelPhoto	normal	light	glass	94.7%	0.951	11.57	0.0	ok
Slider	normal	light	normal	95.1%	0.959	1.56	0.0	ok
CheckBox	disabled	dark	normal	95.4%	0.992	0.25	0.0	ok
RadioButton	disabled	dark	normal	95.4%	0.992	0.25	0.0	ok
Switch	normal	light	normal	95.5%	0.986	0.70	0.0	ok
CheckBox	selected	light	normal	95.8%	0.995	0.65	0.0	ok
CheckBox	normal	dark	normal	95.8%	0.992	0.39	0.0	ok
RadioButton	normal	dark	normal	95.8%	0.992	0.39	0.0	ok
Switch	selected	dark	normal	95.9%	0.985	1.02	0.0	ok
TextField	normal	dark	normal	96.0%	0.937	4.53	0.0	ok
RadioButton	selected	dark	normal	96.1%	0.989	0.67	0.0	ok
Switch	disabled	light	normal	96.4%	0.990	0.53	0.0	ok
TextField	disabled	dark	normal	96.4%	0.940	3.39	0.0	ok
Switch	normal	dark	normal	96.8%	0.986	0.82	0.0	ok
TabOne	normal	light	normal	96.9%	0.948	2.57	0.0	OFF (off 6px, w 0.86)
GlassIcon	normal	dark	normal	97.2%	0.955	3.32	0.0	ok
GlassText	normal	dark	normal	97.3%	0.956	3.27	+0.1	ok
GlassPanelGrey	normal	dark	normal	97.4%	0.959	3.41	0.0	ok
TabOne	normal	dark	normal	97.4%	0.953	1.49	0.0	OFF (w 0.86)
ProgressBar	normal	dark	normal	97.5%	0.997	0.60	0.0	ok
ProgressBar	normal	light	normal	97.6%	0.999	0.61	0.0	ok
GlassPanelRed	normal	dark	normal	97.7%	0.980	6.75	0.0	ok
CheckBox	selected	dark	normal	97.9%	0.995	0.37	0.0	ok
Dialog	normal	dark	normal	97.9%	0.961	1.38	0.0	ok
GlassPanelGrad	normal	dark	normal	97.9%	0.975	4.86	0.0	ok
Dialog	normal	light	normal	98.0%	0.963	1.42	0.0	ok
Switch	disabled	dark	normal	98.0%	0.987	0.41	0.0	ok
GlassIcon	normal	light	normal	98.2%	0.975	3.65	0.0	ok
GlassText	normal	light	normal	98.3%	0.978	3.58	+0.1	ok
GlassPanelGrad	normal	light	normal	98.4%	0.988	5.52	0.0	ok
GlassPanelGrey	normal	light	normal	98.7%	0.987	3.64	0.0	ok
GlassPanelRed	normal	light	normal	98.8%	0.990	4.14	0.0	ok

Geometry vs native (bbox offset / size ratio / center offset / corner radius) -- gated separately from the visual score

Component	State	Appearance	bbox dx,dy (px)	w ratio	h ratio	center off (px)	radius native->cn1 (px)
Button	normal	dark	+0,-6	1.094	1.067	10.9	90.5 -> 45.2
Button	disabled	dark	+0,-6	1.094	1.067	10.9	92.0 -> 45.2
Button	pressed	dark	+0,-6	1.094	1.080	10.8	79.4 -> 45.3
Button	normal	light	+0,+0	1.094	1.000	10.5	45.7 -> 45.3
Button	pressed	light	+0,+0	1.094	1.000	10.5	87.5 -> 45.4
Button	disabled	light	+0,+0	1.094	1.000	10.5	49.1 -> 45.3
TabsGeom	normal	light	+3,+0	0.990	1.069	6.1	79.8 -> 83.6
TabOne	normal	light	+19,+0	0.863	1.069	6.1	80.9 -> 83.6
TabsGeom	normal	dark	+3,+0	0.990	1.064	5.6	98.6 -> 99.1
TabOne	normal	dark	+19,+0	0.863	1.064	5.6	95.2 -> 95.6
Tabs	normal	light	+4,+0	0.988	1.064	5.5	85.9 -> 87.9
GlassIcon	normal	dark	+1,+8	0.998	0.976	5.5	102.3 -> 102.4
GlassText	normal	dark	+1,+8	0.998	0.976	5.5	102.3 -> 102.4
Tabs	normal	dark	+4,+0	0.987	1.058	5.1	92.9 -> 93.7
Toolbar	normal	dark	+6,-3	0.983	1.009	3.5	90.3 -> 55.5
Toolbar	normal	light	+6,+7	0.984	0.926	3.2	70.9 -> 56.1
RaisedButton	disabled	dark	+0,-6	1.009	1.079	2.7	89.6 -> 46.1
Switch	selected	light	+0,+0	1.028	1.026	2.7	-
Slider	disabled	light	+0,-29	1.000	4.500	2.5	-
Switch	normal	light	+0,+0	1.023	1.013	2.1	-
Switch	disabled	light	+0,+0	1.023	1.013	2.1	-
Switch	normal	dark	+0,+0	1.023	1.013	2.1	-
Switch	disabled	dark	+0,+0	1.023	1.013	2.1	-
Spinner	normal	light	+11,-8	0.978	1.052	1.6	-
RaisedButton	disabled	light	+0,+0	1.014	1.011	1.6	71.9 -> 96.6
FlatButton	normal	light	+0,+0	0.980	1.011	1.6	86.2 -> 51.8
Switch	selected	dark	+0,+0	1.017	1.013	1.6	-
Spinner	normal	dark	+12,-8	0.977	1.052	1.5	-
CheckBox	normal	light	+0,+0	0.977	0.977	1.4	-
RadioButton	normal	light	+0,+0	0.977	0.977	1.4	-
RadioButton	selected	light	+0,+0	0.977	0.977	1.4	-
CheckBox	selected	light	+0,+0	0.977	0.977	1.4	-
CheckBox	normal	dark	+0,+0	0.977	0.977	1.4	-
RadioButton	normal	dark	+0,+0	0.977	0.977	1.4	-
RadioButton	selected	dark	+0,+0	0.977	0.977	1.4	-
CheckBox	selected	dark	+0,+0	0.977	0.977	1.4	-
FlatButton	pressed	light	+1,+0	0.973	1.011	1.1	94.6 -> 65.6
RaisedButton	pressed	dark	+0,+0	1.009	1.011	1.1	44.6 -> 44.3
RaisedButton	normal	dark	+0,+0	1.009	1.011	1.1	44.5 -> 44.3
CheckBox	disabled	dark	+1,+0	0.966	0.977	1.1	-
RadioButton	disabled	dark	+1,+0	0.966	0.977	1.1	-
RaisedButton	pressed	light	+0,+0	1.009	1.000	1.0	43.3 -> 44.3
RaisedButton	normal	light	+0,+0	1.009	1.000	1.0	43.3 -> 44.1
FlatButton	normal	dark	+4,+0	0.952	1.011	0.7	86.1 -> 95.7
FlatButton	pressed	dark	+4,+0	0.952	1.011	0.7	94.7 -> 97.9
GlassPanelPhoto	normal	light	+1,+1	0.997	0.995	0.7	35.1 -> 33.5
GlassPanelGrey	normal	light	+1,+1	0.997	0.995	0.7	30.0 -> 27.4
Slider	disabled	dark	+0,-1	1.000	1.015	0.5	-
CheckBox	disabled	light	+1,+0	0.977	0.988	0.5	-
RadioButton	disabled	light	+1,+0	0.977	0.988	0.5	-
Slider	normal	light	+0,+1	1.000	0.964	0.5	-
GlassPanelGrey	normal	dark	+1,+2	0.998	0.986	0.5	101.8 -> 102.4
ProgressBar	normal	dark	+0,+0	1.000	0.900	0.5	-
ProgressBar	normal	light	+0,+0	1.000	0.900	0.5	-
GlassPanelGrad	normal	dark	+1,+0	0.998	0.995	0.5	102.0 -> 102.1
GlassIcon	normal	light	+1,+0	0.998	1.005	0.5	91.7 -> 92.8
GlassText	normal	light	+1,+0	0.998	1.005	0.5	91.7 -> 92.8
GlassPanelGrad	normal	light	+1,+0	0.998	1.005	0.5	24.3 -> 26.8
GlassPanelRed	normal	light	+1,+0	0.998	1.005	0.5	24.4 -> 25.7
TextField	normal	light	+0,+0	1.000	1.000	0.0	13.4 -> 40.0
TextField	disabled	light	+0,+0	1.000	1.000	0.0	13.9 -> 40.4
Slider	normal	dark	+0,+0	1.000	1.000	0.0	-
GlassPanelPhoto	normal	dark	+2,+1	0.996	0.991	0.0	67.3 -> 67.5
TextField	normal	dark	+0,+0	1.000	1.000	0.0	6.4 -> 15.1
TextField	disabled	dark	+0,+0	1.000	1.000	0.0	6.4 -> 15.9
GlassPanelRed	normal	dark	+1,-2	0.998	1.020	0.0	102.2 -> 102.5
Dialog	normal	dark	+0,+0	1.000	1.000	0.0	-
Dialog	normal	light	+0,+0	1.000	1.000	0.0	-

Side-by-side comparisons (worst first)

Toolbar_normal_dark -- 74.49% fidelity (SSIM 0.9295) (no change)

Left: native widget. Right: Codename One render.
Button_normal_dark -- 79.28% fidelity (SSIM 0.9380) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_dark -- 79.63% fidelity (SSIM 0.9423) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_dark -- 81.15% fidelity (SSIM 0.9544) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_dark -- 86.22% fidelity (SSIM 0.8999) (+0.33 vs baseline)

Left: native widget. Right: Codename One render.
Button_pressed_dark -- 86.28% fidelity (SSIM 0.9483) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_light -- 86.43% fidelity (SSIM 0.8954) (+0.31 vs baseline)

Left: native widget. Right: Codename One render.
TextField_normal_light -- 86.49% fidelity (SSIM 0.9502) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_light -- 86.94% fidelity (SSIM 0.9488) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_light -- 89.39% fidelity (SSIM 0.9540) (no change)

Left: native widget. Right: Codename One render.
Button_normal_light -- 89.45% fidelity (SSIM 0.9588) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_light -- 89.45% fidelity (SSIM 0.9588) (no change)

Left: native widget. Right: Codename One render.
Spinner_normal_dark -- 90.72% fidelity (SSIM 0.8800) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_dark -- 90.88% fidelity (SSIM 0.9805) (no change)

Left: native widget. Right: Codename One render.
Button_disabled_light -- 91.57% fidelity (SSIM 0.9621) (no change)

Left: native widget. Right: Codename One render.
Spinner_normal_light -- 91.58% fidelity (SSIM 0.9097) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_light -- 91.66% fidelity (SSIM 0.9935) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_light -- 91.66% fidelity (SSIM 0.9935) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_dark -- 92.13% fidelity (SSIM 0.9434) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_light -- 92.13% fidelity (SSIM 0.9806) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_light -- 92.31% fidelity (SSIM 0.9948) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_light -- 92.31% fidelity (SSIM 0.9948) (no change)

Left: native widget. Right: Codename One render.
FlatButton_pressed_dark -- 92.38% fidelity (SSIM 0.9821) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_light -- 92.40% fidelity (SSIM 0.9596) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_dark -- 92.52% fidelity (SSIM 0.9441) (no change)

Left: native widget. Right: Codename One render.
TabsGeom_normal_light -- 93.13% fidelity (SSIM 0.8851) (+0.14 vs baseline)

Left: native widget. Right: Codename One render.
FlatButton_pressed_light -- 93.29% fidelity (SSIM 0.9811) (no change)

Left: native widget. Right: Codename One render.
TabsGeom_normal_dark -- 93.81% fidelity (SSIM 0.8925) (+0.14 vs baseline)

Left: native widget. Right: Codename One render.
FlatButton_normal_light -- 93.91% fidelity (SSIM 0.9811) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_light -- 93.96% fidelity (SSIM 0.9625) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_dark -- 94.08% fidelity (SSIM 0.9659) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_dark -- 94.13% fidelity (SSIM 0.9660) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_light -- 94.26% fidelity (SSIM 0.9903) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_light -- 94.53% fidelity (SSIM 0.9633) (no change)

Left: native widget. Right: Codename One render.
GlassPanelPhoto_normal_dark -- 94.60% fidelity (SSIM 0.9505) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_light -- 94.64% fidelity (SSIM 0.9632) (no change)

Left: native widget. Right: Codename One render.
GlassPanelPhoto_normal_light -- 94.66% fidelity (SSIM 0.9507) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_light -- 95.09% fidelity (SSIM 0.9588) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_dark -- 95.41% fidelity (SSIM 0.9924) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_dark -- 95.41% fidelity (SSIM 0.9924) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_light -- 95.51% fidelity (SSIM 0.9863) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_light -- 95.80% fidelity (SSIM 0.9951) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_dark -- 95.84% fidelity (SSIM 0.9922) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_dark -- 95.84% fidelity (SSIM 0.9922) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_dark -- 95.90% fidelity (SSIM 0.9850) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_dark -- 96.00% fidelity (SSIM 0.9370) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_dark -- 96.13% fidelity (SSIM 0.9894) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_light -- 96.35% fidelity (SSIM 0.9896) (no change)

Left: native widget. Right: Codename One render.
TextField_disabled_dark -- 96.35% fidelity (SSIM 0.9395) (no change)

Left: native widget. Right: Codename One render.
Switch_normal_dark -- 96.80% fidelity (SSIM 0.9855) (no change)

Left: native widget. Right: Codename One render.
TabOne_normal_light -- 96.90% fidelity (SSIM 0.9480) (no change)

Left: native widget. Right: Codename One render.
GlassIcon_normal_dark -- 97.18% fidelity (SSIM 0.9547) (no change)

Left: native widget. Right: Codename One render.
GlassText_normal_dark -- 97.27% fidelity (SSIM 0.9563) (+0.06 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrey_normal_dark -- 97.35% fidelity (SSIM 0.9588) (no change)

Left: native widget. Right: Codename One render.
TabOne_normal_dark -- 97.36% fidelity (SSIM 0.9531) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_dark -- 97.47% fidelity (SSIM 0.9973) (no change)

Left: native widget. Right: Codename One render.
ProgressBar_normal_light -- 97.60% fidelity (SSIM 0.9989) (no change)

Left: native widget. Right: Codename One render.
GlassPanelRed_normal_dark -- 97.73% fidelity (SSIM 0.9795) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_dark -- 97.85% fidelity (SSIM 0.9945) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_dark -- 97.86% fidelity (SSIM 0.9614) (no change)

Left: native widget. Right: Codename One render.
GlassPanelGrad_normal_dark -- 97.91% fidelity (SSIM 0.9752) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_light -- 97.95% fidelity (SSIM 0.9634) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_dark -- 98.01% fidelity (SSIM 0.9869) (no change)

Left: native widget. Right: Codename One render.
GlassIcon_normal_light -- 98.16% fidelity (SSIM 0.9750) (no change)

Left: native widget. Right: Codename One render.
GlassText_normal_light -- 98.31% fidelity (SSIM 0.9779) (+0.06 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrad_normal_light -- 98.41% fidelity (SSIM 0.9876) (no change)

Left: native widget. Right: Codename One render.
GlassPanelGrey_normal_light -- 98.70% fidelity (SSIM 0.9865) (no change)

Left: native widget. Right: Codename One render.
GlassPanelRed_normal_light -- 98.78% fidelity (SSIM 0.9900) (no change)

Left: native widget. Right: Codename One render.

…ndroid duplicate classes, guide snippets, mac goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…'s coroutines version Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-26T03:06:37Z

Native fidelity (iOS Modern, Metal)

68 pairs compared -- median 95.0%, worst 83.5% (Tabs_normal_dark), 25th pct 92.5%, mean 94.6%.

Distribution -- >=99%: 3 | 95-99%: 31 | 90-95%: 29 | <90%: 5

Component	State	Appearance	Material	Fidelity	SSIM	mean delta	vs base	Geometry
Tabs	normal	dark	glass	83.5%	0.884	11.66	0.0	ok
Tabs	normal	light	glass	86.4%	0.896	8.00	0.0	ok
Toolbar	normal	light	glass	87.6%	0.951	4.24	0.0	ok
Toolbar	normal	dark	glass	87.7%	0.950	3.69	0.0	ok
Button	pressed	dark	glass	89.9%	0.958	4.21	0.0	OFF (off 12px, w 1.10)
TextField	normal	light	normal	90.0%	0.958	2.78	-0.4	ok
Spinner	normal	dark	normal	90.8%	0.881	3.39	-0.7	ok
TextField	disabled	light	normal	91.1%	0.962	2.24	-0.2	ok
Spinner	normal	light	normal	91.6%	0.910	4.11	-0.2	ok
RaisedButton	disabled	light	glass	91.8%	0.961	3.09	+0.2	ok
Button	normal	dark	glass	91.8%	0.958	3.52	0.0	OFF (off 12px, w 1.10)
Slider	disabled	dark	normal	92.1%	0.943	2.45	-0.3	ok
Switch	selected	light	normal	92.1%	0.981	1.47	0.0	ok
CheckBox	normal	light	normal	92.2%	0.994	0.68	0.0	ok
RadioButton	normal	light	normal	92.2%	0.994	0.68	0.0	ok
FlatButton	normal	dark	glass	92.2%	0.983	2.21	+4.3	ok
Button	normal	light	glass	92.4%	0.961	3.65	0.0	OFF (off 12px, w 1.10)
Slider	normal	dark	normal	92.5%	0.944	2.63	-0.2	ok
RaisedButton	disabled	dark	glass	92.7%	0.965	2.72	+1.3	ok
CheckBox	disabled	light	normal	92.7%	0.995	0.50	0.0	ok
RadioButton	disabled	light	normal	92.7%	0.995	0.50	0.0	ok
Button	pressed	light	glass	92.9%	0.962	3.29	0.0	OFF (off 12px, w 1.10)
FlatButton	pressed	dark	glass	92.9%	0.985	1.26	+2.3	ok
TabsGeom	normal	dark	normal	93.0%	0.892	8.75	0.0	ok
TabsGeom	normal	light	normal	93.0%	0.886	7.09	0.0	ok
FlatButton	pressed	light	glass	93.2%	0.982	1.90	+4.3	ok
Button	disabled	dark	glass	93.5%	0.962	2.47	0.0	OFF (off 12px, w 1.10)
Slider	disabled	light	normal	94.0%	0.963	1.75	-0.1	OFF (h 4.50)
FlatButton	normal	light	glass	94.2%	0.983	1.79	+1.3	ok
Button	disabled	light	glass	94.4%	0.964	2.36	0.0	OFF (off 12px, w 1.10)
RaisedButton	pressed	dark	glass	94.6%	0.965	2.07	+1.5	ok
RaisedButton	normal	dark	glass	94.6%	0.966	2.08	+1.7	ok
RaisedButton	pressed	light	glass	94.8%	0.967	2.22	+2.0	ok
RadioButton	selected	light	normal	94.8%	0.992	0.86	0.0	ok
RaisedButton	normal	light	glass	95.0%	0.967	2.19	+2.4	ok
Slider	normal	light	normal	95.1%	0.959	1.56	0.0	ok
Switch	normal	light	normal	95.5%	0.986	0.70	0.0	ok
CheckBox	disabled	dark	normal	95.8%	0.993	0.25	0.0	ok
RadioButton	disabled	dark	normal	95.8%	0.993	0.25	0.0	ok
CheckBox	selected	light	normal	95.8%	0.994	0.67	0.0	ok
Switch	selected	dark	normal	95.9%	0.985	1.02	0.0	ok
Switch	disabled	light	normal	96.4%	0.990	0.53	0.0	ok
CheckBox	normal	dark	normal	96.5%	0.993	0.35	0.0	ok
RadioButton	normal	dark	normal	96.5%	0.993	0.35	0.0	ok
GlassPanelPhoto	normal	light	glass	96.7%	0.980	7.95	+0.6	ok
GlassPanelPhoto	normal	dark	glass	96.8%	0.983	8.78	+0.6	ok
TabOne	normal	dark	normal	96.8%	0.953	4.44	+0.7	ok
Switch	normal	dark	normal	96.8%	0.986	0.82	0.0	ok
RadioButton	selected	dark	normal	96.8%	0.991	0.57	0.0	ok
TextField	normal	dark	normal	96.9%	0.949	3.30	-0.2	ok
TextField	disabled	dark	normal	97.2%	0.953	2.37	-0.2	ok
ProgressBar	normal	dark	normal	97.5%	0.997	0.60	+3.0	ok
TabOne	normal	light	normal	97.5%	0.961	2.90	+1.9	ok
ProgressBar	normal	light	normal	97.6%	0.999	0.61	+2.2	ok
CheckBox	selected	dark	normal	97.8%	0.993	0.38	0.0	ok
Dialog	normal	dark	normal	97.9%	0.961	1.38	+0.9	ok
Dialog	normal	light	normal	98.0%	0.963	1.42	+0.9	ok
Switch	disabled	dark	normal	98.0%	0.987	0.41	+2.5	ok
GlassIcon	normal	dark	normal	98.6%	0.984	3.55	0.0	ok
GlassText	normal	dark	normal	98.6%	0.985	3.48	0.0	ok
GlassIcon	normal	light	normal	98.7%	0.986	3.54	0.0	ok
GlassText	normal	light	normal	98.7%	0.987	3.54	0.0	ok
GlassPanelGrad	normal	light	normal	98.9%	0.994	4.38	+0.7	ok
GlassPanelGrad	normal	dark	normal	99.0%	0.993	3.84	+0.5	ok
GlassPanelGrey	normal	dark	normal	99.0%	0.992	3.30	+0.6	ok
GlassPanelGrey	normal	light	normal	99.1%	0.994	3.29	+0.7	ok
GlassPanelRed	normal	dark	normal	99.1%	0.993	3.22	+0.5	ok
GlassPanelRed	normal	light	normal	99.1%	0.994	3.49	+0.7	ok

Geometry vs native (bbox offset / size ratio / center offset / corner radius) -- gated separately from the visual score

Component	State	Appearance	bbox dx,dy (px)	w ratio	h ratio	center off (px)	radius native->cn1 (px)
Button	pressed	dark	+0,+0	1.104	1.000	11.5	45.4 -> 45.3
Button	normal	dark	+0,+0	1.104	1.000	11.5	45.8 -> 45.2
Button	normal	light	+0,+0	1.104	1.000	11.5	44.5 -> 45.3
Button	pressed	light	+0,+0	1.104	1.000	11.5	48.1 -> 45.4
Button	disabled	dark	+0,+0	1.104	1.000	11.5	45.1 -> 45.2
Button	disabled	light	+0,+0	1.104	1.000	11.5	44.0 -> 45.3
TabOne	normal	dark	-3,+0	1.007	0.948	4.9	80.3 -> 77.3
TabOne	normal	light	-3,+0	1.007	0.948	4.9	79.1 -> 77.0
Toolbar	normal	light	+4,+7	0.987	0.926	3.5	62.5 -> 56.1
Toolbar	normal	dark	+4,+7	0.987	0.919	3.2	60.5 -> 55.5
Switch	selected	light	+0,+0	1.028	1.026	2.7	-
RaisedButton	disabled	dark	+0,+0	1.024	1.011	2.6	49.8 -> 46.1
Slider	disabled	light	+0,-29	1.000	4.500	2.5	-
CheckBox	disabled	light	+1,-3	1.000	1.023	2.2	-
RadioButton	disabled	light	+1,-3	1.000	1.023	2.2	-
CheckBox	disabled	dark	+1,-3	1.000	1.023	2.2	-
RadioButton	disabled	dark	+1,-3	1.000	1.023	2.2	-
RaisedButton	disabled	light	+0,+0	1.019	1.011	2.1	54.1 -> 96.6
RaisedButton	pressed	dark	+0,+0	1.019	1.011	2.1	44.5 -> 44.3
RaisedButton	normal	dark	+0,+0	1.019	1.011	2.1	44.4 -> 44.3
RaisedButton	pressed	light	+0,+0	1.019	1.011	2.1	44.7 -> 44.3
RaisedButton	normal	light	+0,+0	1.019	1.011	2.1	44.5 -> 44.1
Switch	normal	light	+0,+0	1.023	1.013	2.1	-
Switch	disabled	light	+0,+0	1.023	1.013	2.1	-
Switch	normal	dark	+0,+0	1.023	1.013	2.1	-
Switch	disabled	dark	+0,+0	1.023	1.013	2.1	-
CheckBox	normal	dark	+0,-2	1.000	1.000	2.0	-
RadioButton	normal	dark	+0,-2	1.000	1.000	2.0	-
RadioButton	selected	dark	+0,-2	1.000	1.000	2.0	-
CheckBox	selected	dark	+0,-2	1.000	1.000	2.0	-
Tabs	normal	dark	+9,+0	0.973	1.012	1.8	79.7 -> 80.7
Tabs	normal	light	+9,+0	0.973	1.012	1.8	79.2 -> 80.3
TabsGeom	normal	dark	+9,+0	0.973	1.012	1.8	80.5 -> 80.9
TabsGeom	normal	light	+9,+0	0.973	1.012	1.8	79.3 -> 80.6
FlatButton	normal	dark	+4,+0	0.966	1.011	1.6	91.8 -> 95.7
FlatButton	pressed	dark	+4,+0	0.966	1.011	1.6	95.3 -> 97.9
Switch	selected	dark	+0,+0	1.017	1.013	1.6	-
CheckBox	normal	light	+0,-2	1.000	1.011	1.5	-
RadioButton	normal	light	+0,-2	1.000	1.011	1.5	-
RadioButton	selected	light	+0,-2	1.000	1.011	1.5	-
CheckBox	selected	light	+0,-2	1.000	1.011	1.5	-
Spinner	normal	light	+11,-9	0.978	1.055	1.1	-
GlassIcon	normal	dark	+0,+1	0.999	1.000	1.1	92.1 -> 91.5
GlassText	normal	dark	+0,+1	0.999	1.000	1.1	92.1 -> 91.5
Spinner	normal	dark	+12,-9	0.977	1.055	1.0	-
GlassPanelGrey	normal	dark	+0,+1	1.000	1.000	1.0	26.4 -> 26.9
TextField	disabled	light	+0,+1	0.999	0.996	0.7	13.9 -> 38.7
FlatButton	normal	light	+0,+0	0.993	1.011	0.7	91.9 -> 51.8
Slider	disabled	dark	+0,-1	1.000	1.015	0.5	-
FlatButton	pressed	light	+1,+0	0.986	1.011	0.5	95.4 -> 65.6
Slider	normal	light	+0,+1	1.000	0.964	0.5	-
GlassPanelPhoto	normal	light	+0,+0	1.000	1.005	0.5	25.6 -> 31.4
GlassPanelPhoto	normal	dark	+0,+0	1.000	1.005	0.5	23.0 -> 27.0
ProgressBar	normal	dark	+0,+0	1.000	0.900	0.5	-
ProgressBar	normal	light	+0,+0	1.000	0.900	0.5	-
GlassIcon	normal	light	+0,+0	1.000	1.005	0.5	91.6 -> 92.3
GlassText	normal	light	+0,+0	1.000	1.005	0.5	91.6 -> 92.3
GlassPanelGrad	normal	light	+0,+0	1.000	1.005	0.5	22.3 -> 25.9
GlassPanelGrad	normal	dark	+1,+1	0.998	0.995	0.5	25.7 -> 22.5
GlassPanelGrey	normal	light	+0,+0	1.000	1.005	0.5	22.4 -> 26.0
GlassPanelRed	normal	dark	+1,+1	0.998	0.995	0.5	26.6 -> 22.8
GlassPanelRed	normal	light	+0,+0	1.000	1.005	0.5	22.1 -> 26.1
TextField	normal	light	+0,+0	1.000	1.000	0.0	13.4 -> 40.5
Slider	normal	dark	+0,+0	1.000	1.000	0.0	-
TextField	normal	dark	+0,+0	1.000	1.000	0.0	6.4 -> 15.1
TextField	disabled	dark	+0,+0	1.000	1.000	0.0	6.4 -> 15.9
Dialog	normal	dark	+0,+0	1.000	1.000	0.0	-
Dialog	normal	light	+0,+0	1.000	1.000	0.0	-

Side-by-side comparisons (worst first)

Tabs_normal_dark -- 83.45% fidelity (SSIM 0.8842) (no change)

Left: native widget. Right: Codename One render.
Tabs_normal_light -- 86.44% fidelity (SSIM 0.8961) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_light -- 87.64% fidelity (SSIM 0.9511) (no change)

Left: native widget. Right: Codename One render.
Toolbar_normal_dark -- 87.70% fidelity (SSIM 0.9495) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_dark -- 89.93% fidelity (SSIM 0.9576) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_light -- 90.03% fidelity (SSIM 0.9576) (-0.37 vs baseline)

Left: native widget. Right: Codename One render.
Spinner_normal_dark -- 90.78% fidelity (SSIM 0.8814) (-0.69 vs baseline)

Left: native widget. Right: Codename One render.
TextField_disabled_light -- 91.13% fidelity (SSIM 0.9619) (-0.22 vs baseline)

Left: native widget. Right: Codename One render.
Spinner_normal_light -- 91.58% fidelity (SSIM 0.9099) (-0.21 vs baseline)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_light -- 91.76% fidelity (SSIM 0.9613) (+0.15 vs baseline)

Left: native widget. Right: Codename One render.
Button_normal_dark -- 91.84% fidelity (SSIM 0.9583) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_dark -- 92.13% fidelity (SSIM 0.9434) (-0.31 vs baseline)

Left: native widget. Right: Codename One render.
Switch_selected_light -- 92.13% fidelity (SSIM 0.9806) (no change)

Left: native widget. Right: Codename One render.
CheckBox_normal_light -- 92.16% fidelity (SSIM 0.9938) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_light -- 92.16% fidelity (SSIM 0.9938) (no change)

Left: native widget. Right: Codename One render.
FlatButton_normal_dark -- 92.21% fidelity (SSIM 0.9833) (+4.25 vs baseline)

Left: native widget. Right: Codename One render.
Button_normal_light -- 92.37% fidelity (SSIM 0.9609) (no change)

Left: native widget. Right: Codename One render.
Slider_normal_dark -- 92.52% fidelity (SSIM 0.9441) (-0.22 vs baseline)

Left: native widget. Right: Codename One render.
RaisedButton_disabled_dark -- 92.65% fidelity (SSIM 0.9653) (+1.25 vs baseline)

Left: native widget. Right: Codename One render.
CheckBox_disabled_light -- 92.71% fidelity (SSIM 0.9953) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_light -- 92.71% fidelity (SSIM 0.9953) (no change)

Left: native widget. Right: Codename One render.
Button_pressed_light -- 92.88% fidelity (SSIM 0.9617) (no change)

Left: native widget. Right: Codename One render.
FlatButton_pressed_dark -- 92.90% fidelity (SSIM 0.9849) (+2.31 vs baseline)

Left: native widget. Right: Codename One render.
TabsGeom_normal_dark -- 93.02% fidelity (SSIM 0.8921) (+0.01 vs baseline)

Left: native widget. Right: Codename One render.
TabsGeom_normal_light -- 93.02% fidelity (SSIM 0.8861) (no change)

Left: native widget. Right: Codename One render.
FlatButton_pressed_light -- 93.20% fidelity (SSIM 0.9819) (+4.33 vs baseline)

Left: native widget. Right: Codename One render.
Button_disabled_dark -- 93.52% fidelity (SSIM 0.9618) (no change)

Left: native widget. Right: Codename One render.
Slider_disabled_light -- 93.96% fidelity (SSIM 0.9625) (-0.05 vs baseline)

Left: native widget. Right: Codename One render.
FlatButton_normal_light -- 94.18% fidelity (SSIM 0.9825) (+1.32 vs baseline)

Left: native widget. Right: Codename One render.
Button_disabled_light -- 94.35% fidelity (SSIM 0.9636) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_dark -- 94.56% fidelity (SSIM 0.9653) (+1.46 vs baseline)

Left: native widget. Right: Codename One render.
RaisedButton_normal_dark -- 94.57% fidelity (SSIM 0.9659) (+1.69 vs baseline)

Left: native widget. Right: Codename One render.
RaisedButton_pressed_light -- 94.80% fidelity (SSIM 0.9665) (+2.04 vs baseline)

Left: native widget. Right: Codename One render.
RadioButton_selected_light -- 94.84% fidelity (SSIM 0.9916) (no change)

Left: native widget. Right: Codename One render.
RaisedButton_normal_light -- 95.01% fidelity (SSIM 0.9673) (+2.40 vs baseline)

Left: native widget. Right: Codename One render.
Slider_normal_light -- 95.09% fidelity (SSIM 0.9588) (-0.04 vs baseline)

Left: native widget. Right: Codename One render.
Switch_normal_light -- 95.51% fidelity (SSIM 0.9863) (no change)

Left: native widget. Right: Codename One render.
CheckBox_disabled_dark -- 95.76% fidelity (SSIM 0.9928) (no change)

Left: native widget. Right: Codename One render.
RadioButton_disabled_dark -- 95.76% fidelity (SSIM 0.9928) (no change)

Left: native widget. Right: Codename One render.
CheckBox_selected_light -- 95.80% fidelity (SSIM 0.9938) (no change)

Left: native widget. Right: Codename One render.
Switch_selected_dark -- 95.90% fidelity (SSIM 0.9850) (no change)

Left: native widget. Right: Codename One render.
Switch_disabled_light -- 96.35% fidelity (SSIM 0.9896) (+0.04 vs baseline)

Left: native widget. Right: Codename One render.
CheckBox_normal_dark -- 96.52% fidelity (SSIM 0.9927) (no change)

Left: native widget. Right: Codename One render.
RadioButton_normal_dark -- 96.52% fidelity (SSIM 0.9927) (no change)

Left: native widget. Right: Codename One render.
GlassPanelPhoto_normal_light -- 96.72% fidelity (SSIM 0.9804) (+0.64 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelPhoto_normal_dark -- 96.76% fidelity (SSIM 0.9832) (+0.59 vs baseline)

Left: native widget. Right: Codename One render.
TabOne_normal_dark -- 96.77% fidelity (SSIM 0.9526) (+0.73 vs baseline)

Left: native widget. Right: Codename One render.
Switch_normal_dark -- 96.80% fidelity (SSIM 0.9855) (no change)

Left: native widget. Right: Codename One render.
RadioButton_selected_dark -- 96.81% fidelity (SSIM 0.9908) (no change)

Left: native widget. Right: Codename One render.
TextField_normal_dark -- 96.88% fidelity (SSIM 0.9492) (-0.20 vs baseline)

Left: native widget. Right: Codename One render.
TextField_disabled_dark -- 97.19% fidelity (SSIM 0.9526) (-0.15 vs baseline)

Left: native widget. Right: Codename One render.
ProgressBar_normal_dark -- 97.47% fidelity (SSIM 0.9973) (+3.03 vs baseline)

Left: native widget. Right: Codename One render.
TabOne_normal_light -- 97.51% fidelity (SSIM 0.9608) (+1.89 vs baseline)

Left: native widget. Right: Codename One render.
ProgressBar_normal_light -- 97.60% fidelity (SSIM 0.9989) (+2.19 vs baseline)

Left: native widget. Right: Codename One render.
CheckBox_selected_dark -- 97.79% fidelity (SSIM 0.9932) (no change)

Left: native widget. Right: Codename One render.
Dialog_normal_dark -- 97.86% fidelity (SSIM 0.9614) (+0.89 vs baseline)

Left: native widget. Right: Codename One render.
Dialog_normal_light -- 97.95% fidelity (SSIM 0.9634) (+0.86 vs baseline)

Left: native widget. Right: Codename One render.
Switch_disabled_dark -- 98.01% fidelity (SSIM 0.9869) (+2.48 vs baseline)

Left: native widget. Right: Codename One render.
GlassIcon_normal_dark -- 98.59% fidelity (SSIM 0.9841) (no change)

Left: native widget. Right: Codename One render.
GlassText_normal_dark -- 98.64% fidelity (SSIM 0.9848) (+0.05 vs baseline)

Left: native widget. Right: Codename One render.
GlassIcon_normal_light -- 98.67% fidelity (SSIM 0.9860) (no change)

Left: native widget. Right: Codename One render.
GlassText_normal_light -- 98.74% fidelity (SSIM 0.9874) (+0.05 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrad_normal_light -- 98.91% fidelity (SSIM 0.9935) (+0.67 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrad_normal_dark -- 98.98% fidelity (SSIM 0.9928) (+0.55 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrey_normal_dark -- 98.99% fidelity (SSIM 0.9917) (+0.57 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelGrey_normal_light -- 99.05% fidelity (SSIM 0.9936) (+0.67 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelRed_normal_dark -- 99.09% fidelity (SSIM 0.9926) (+0.52 vs baseline)

Left: native widget. Right: Codename One render.
GlassPanelRed_normal_light -- 99.10% fidelity (SSIM 0.9939) (+0.67 vs baseline)

Left: native widget. Right: Codename One render.

# Conflicts: # .github/workflows/developer-guide-docs.yml # scripts/copyright-header-exclusions.txt

github-actions · 2026-10-26T04:12:39Z

Developer Guide build artifacts are available for download from this workflow run:

Developer Guide quality checks:

AsciiDoc linter: No issues found (report)
Vale: No alerts found (report)
Paragraph capitalization: No paragraph capitalization issues (report)
LanguageTool: No grammar matches (report)
Image references: No unused images detected (report)

github-actions · 2026-10-26T04:29:58Z

Cloudflare Preview

URL: https://pr-6106-website-preview.codenameone.pages.dev
Branch: pr-6106-website-preview

…names real animate functions Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-26T05:18:14Z

Compared 210 screenshots: 210 matched.
Native Windows port (x64 / Intel-AMD): full hellocodenameone screenshot suite rendered offscreen with Direct2D/DirectWrite, plus the real benchmarks (base64 native/CN1/SIMD, image createMask/applyMask/modifyAlpha/PNG/JPEG, SSE2 SIMD kernels). Compared against the in-repo baseline in scripts/windows/screenshots.

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 63ms / native 5ms = 12.6x speedup
SIMD float-mul (64K x300)	java 58ms / native 5ms = 11.6x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 native bridge	unavailable (CN1 + SIMD + image benchmarks only)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	74.000 ms
Base64 CN1 decode	98.000 ms
Base64 SIMD encode	105.000 ms
Base64 encode ratio (SIMD/CN1)	1.419x (41.9% slower)
Base64 SIMD decode	99.000 ms
Base64 decode ratio (SIMD/CN1)	1.010x (1.0% slower)
Image encode benchmark iterations	100
Image createMask (SIMD off)	11.000 ms
Image createMask (SIMD on)	5.000 ms
Image createMask ratio (SIMD on/off)	0.455x (54.5% faster)
Image applyMask (SIMD off)	38.000 ms
Image applyMask (SIMD on)	37.000 ms
Image applyMask ratio (SIMD on/off)	0.974x (2.6% faster)
Image modifyAlpha (SIMD off)	37.000 ms
Image modifyAlpha (SIMD on)	15.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.405x (59.5% faster)
Image modifyAlpha removeColor (SIMD off)	35.000 ms
Image modifyAlpha removeColor (SIMD on)	21.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.600x (40.0% faster)

ParparVM vs HotSpot (JDK 25): Windows x64

Runner CPU: AMD64 Family 25 Model 1 Stepping 1, AuthenticAMD (baseline windows-x64@amd64-family-25-model-1-authenticamd)

Ratios are ParparVM / JDK 25: below 1.00x ParparVM is faster (time) or smaller (RAM). Median of 5 interleaved, paired rounds; every run's output was verified. A ratio more than 20% (time) / 25% (RAM) above its baseline in vm/selfhost/perf-baseline/ is a regression and fails; one that far below is an improvement, reported but not failed (a row whose calibration runs were noisier carries a wider tolerance), and for RAM the change must also exceed 0.05x in absolute terms. Both run unpinned on all of the runner's CPUs, with their own default thread counts.

Benchmark	Cores	Time	RAM	Status
hello (WinHelloMain)	4	1.42x (base 1.22x, +16.2%)	0.68x (base 0.94x, -27.7%)	ok
translator (self)	4	0.77x (base 0.83x, -8.0%)	0.55x (base 0.54x, +1.5%)	ok
intArithmetic	4	1.10x (base 1.10x, +0.0%)	0.06x (base 0.06x, +2.5%)	ok
longArithmetic	4	1.08x (base 1.08x, -0.1%)	0.06x (base 0.05x, +3.2%)	ok
mathTranscendental	4	0.79x (base 0.79x, +0.1%)	0.06x (base 0.06x, +2.7%)	ok
arraySequential	4	1.32x (base 1.36x, -3.0%)	0.39x (base 0.39x, +0.2%)	ok
arrayRandom	4	1.10x (base 1.06x, +3.9%)	0.23x (base 0.23x, +0.4%)	ok
objectAllocation	4	1.60x (base 1.56x, +2.8%)	0.28x (base 0.39x, -26.3%)	ok
valueEscape	4	0.10x (base 0.10x, +0.3%)	0.05x (base 0.04x, +3.5%)	ok
hashMapChurn	4	1.73x (base 1.80x, -3.7%)	0.09x (base 0.09x, -1.6%)	ok
stringBuilding	4	1.25x (base 1.22x, +2.7%)	0.32x (base 0.32x, -0.1%)	ok
recursion	4	1.45x (base 1.49x, -2.7%)	0.06x (base 0.06x, +1.4%)	ok
quicksort	4	1.10x (base 1.13x, -3.2%)	0.12x (base 0.12x, +0.7%)	ok

Result: no regression

shai-almog · 2026-10-26T05:47:56Z

Compared 210 screenshots: 210 matched.
Native Windows port (arm64 / Apple Silicon - Arm): full hellocodenameone screenshot suite rendered offscreen with Direct2D/DirectWrite, plus the real benchmarks (base64 native/CN1/SIMD, image createMask/applyMask/modifyAlpha/PNG/JPEG, NEON SIMD kernels). Compared against the in-repo baseline in scripts/windows/screenshots.

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 53ms / native 2ms = 26.5x speedup
SIMD float-mul (64K x300)	java 53ms / native 2ms = 26.5x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 native bridge	unavailable (CN1 + SIMD + image benchmarks only)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	62.000 ms
Base64 CN1 decode	70.000 ms
Base64 SIMD encode	78.000 ms
Base64 encode ratio (SIMD/CN1)	1.258x (25.8% slower)
Base64 SIMD decode	73.000 ms
Base64 decode ratio (SIMD/CN1)	1.043x (4.3% slower)
Image encode benchmark iterations	100
Image createMask (SIMD off)	6.000 ms
Image createMask (SIMD on)	3.000 ms
Image createMask ratio (SIMD on/off)	0.500x (50.0% faster)
Image applyMask (SIMD off)	19.000 ms
Image applyMask (SIMD on)	21.000 ms
Image applyMask ratio (SIMD on/off)	1.105x (10.5% slower)
Image modifyAlpha (SIMD off)	22.000 ms
Image modifyAlpha (SIMD on)	24.000 ms
Image modifyAlpha ratio (SIMD on/off)	1.091x (9.1% slower)
Image modifyAlpha removeColor (SIMD off)	26.000 ms
Image modifyAlpha removeColor (SIMD on)	20.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.769x (23.1% faster)

ParparVM vs HotSpot (JDK 25): Windows arm64

Runner CPU: ARMv8 (64-bit) Family 8 Model D49 Revision 0, MICROSOFT CORPORATION (baseline windows-arm64@armv8-64-bit-family-8-model-d49-microsoft-corporation)

Ratios are ParparVM / JDK 25: below 1.00x ParparVM is faster (time) or smaller (RAM). Median of 5 interleaved, paired rounds; every run's output was verified. A ratio more than 20% (time) / 25% (RAM) above its baseline in vm/selfhost/perf-baseline/ is a regression and fails; one that far below is an improvement, reported but not failed (a row whose calibration runs were noisier carries a wider tolerance), and for RAM the change must also exceed 0.05x in absolute terms. Both run unpinned on all of the runner's CPUs, with their own default thread counts.

Benchmark	Cores	Time	RAM	Status
hello (WinHelloMain)	4	1.04x (base 1.11x, -5.8%)	0.71x (base 0.75x, -6.1%)	ok
translator (self)	4	0.87x (base 0.84x, +4.1%)	0.47x (base 0.51x, -7.2%)	ok
intArithmetic	4	1.04x (base 1.04x, -0.1%)	0.06x (base 0.06x, +3.0%)	ok
longArithmetic	4	0.80x (base 0.80x, +0.0%)	0.06x (base 0.06x, +3.5%)	ok
mathTranscendental	4	0.71x (base 0.72x, -1.4%)	0.07x (base 0.06x, +1.8%)	ok
arraySequential	4	0.39x (base 0.46x, -15.1%)	0.39x (base 0.39x, +0.0%)	ok
arrayRandom	4	0.94x (base 0.94x, +0.1%)	0.23x (base 0.23x, +0.5%)	ok
objectAllocation	4	1.80x (base 1.82x, -0.8%)	0.41x (base 0.43x, -4.6%)	ok
valueEscape	4	0.76x (base 0.76x, +0.0%)	0.05x (base 0.05x, +3.4%)	ok
hashMapChurn	4	0.98x (base 0.98x, -0.0%)	0.12x (base 0.12x, +0.1%)	ok
stringBuilding	4	1.53x (base 1.43x, +7.4%)	0.27x (base 0.27x, -0.2%)	ok
recursion	4	1.56x (base 1.46x, +6.4%)	0.07x (base 0.07x, +1.2%)	ok
quicksort	4	1.00x (base 1.00x, +0.3%)	0.12x (base 0.12x, +0.7%)	ok

Result: no regression

github-actions · 2026-10-26T06:01:11Z

✅ ByteCodeTranslator Quality Report

Test & Coverage

✅ Tests: 887 total, 0 failed, 55 skipped

Benchmark Results

Execution Time: 5639 ms
Hotspots (Top 20 sampled methods):
- 9.81% com.codename1.tools.translator.IteratorEscape.ctorOnlyStoresParamsIntoThis (84 samples)
- 5.84% java.lang.System.identityHashCode (50 samples)
- 5.49% java.util.ArrayList.indexOf (47 samples)
- 5.49% java.lang.Object.hashCode (47 samples)
- 4.91% com.codename1.tools.translator.BytecodeMethod.equals (42 samples)
- 3.15% java.lang.StringBuilder.append (27 samples)
- 2.10% java.lang.String.equals (18 samples)
- 1.99% com.codename1.tools.translator.IteratorEscape.mangle (17 samples)
- 1.75% com.codename1.tools.translator.ByteCodeClass.hasDeclaredMethod (15 samples)
- 1.64% com.codename1.tools.translator.classfile.analysis.Frame.execute (14 samples)
- 1.64% java.util.AbstractCollection.containsAll (14 samples)
- 1.52% com.codename1.tools.translator.BytecodeMethod.updateInlinableFieldDependencies (13 samples)
- 1.40% com.codename1.tools.translator.DeadFieldElimination.run (12 samples)
- 1.29% java.util.HashMap.putVal (11 samples)
- 1.29% com.codename1.tools.translator.bytecodes.Invoke.resolveDirectTarget (11 samples)
- 1.29% com.codename1.tools.translator.Parser.cullMethods (11 samples)
- 1.05% com.codename1.tools.translator.ByteCodeClass.generateCCode (9 samples)
- 1.05% com.codename1.tools.translator.Parser.collectTypeTests (9 samples)
- 0.93% java.io.FileOutputStream.writeBytes (8 samples)
- 0.82% com.codename1.tools.translator.ReachabilityCull.run (7 samples)
⚠️ Coverage report not generated.

Static Analysis

✅ SpotBugs: no findings (report was not generated by the build).
⚠️ PMD report not generated.
⚠️ Checkstyle report not generated.

Generated automatically by the PR CI workflow.

shai-almog · 2026-10-26T08:23:18Z

Compared 196 screenshots: 196 matched.
✅ Native Mac screenshot tests passed.

Benchmark Results

VM Translation Time: 0 seconds
Compilation Time: 610 seconds

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 54ms / native 3ms = 18.0x speedup
SIMD float-mul (64K x300)	java 52ms / native 2ms = 26.0x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 native bridge	unavailable (CN1 + SIMD + image benchmarks only)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	active (NEON-accelerated)
Base64 CN1 encode	52.000 ms
Base64 CN1 decode	66.000 ms
Image encode benchmark iterations	100
Image createMask (SIMD off)	8.000 ms
Image createMask (SIMD on)	3.000 ms
Image createMask ratio (SIMD on/off)	0.375x (62.5% faster)
Image applyMask (SIMD off)	65.000 ms
Image applyMask (SIMD on)	56.000 ms
Image applyMask ratio (SIMD on/off)	0.862x (13.8% faster)
Image modifyAlpha (SIMD off)	57.000 ms
Image modifyAlpha (SIMD on)	45.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.789x (21.1% faster)
Image modifyAlpha removeColor (SIMD off)	65.000 ms
Image modifyAlpha removeColor (SIMD on)	44.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.677x (32.3% faster)

ParparVM vs HotSpot (JDK 25): macOS arm64

Runner CPU: Apple M1 (Virtual) (baseline macos-arm64)

Ratios are ParparVM / JDK 25: below 1.00x ParparVM is faster (time) or smaller (RAM). Median of 5 interleaved, paired rounds; every run's output was verified. A ratio more than 20% (time) / 25% (RAM) above its baseline in vm/selfhost/perf-baseline/ is a regression and fails; one that far below is an improvement, reported but not failed (a row whose calibration runs were noisier carries a wider tolerance), and for RAM the change must also exceed 0.05x in absolute terms. Both run unpinned on all of the runner's CPUs, with their own default thread counts.

Benchmark	Cores	Time	RAM	Status
hello (HelloCodenameOne)	3	0.76x (base 0.96x, -20.7%)	0.86x (base 0.93x, -6.6%)	ok
translator (self)	3	0.65x (base 0.62x, +3.8%)	0.76x (base 0.78x, -2.4%)	ok
intArithmetic	3	1.02x (base 1.03x, -1.0%)	0.12x (base 0.12x, +2.0%)	ok
longArithmetic	3	1.04x (base 1.03x, +1.6%)	0.12x (base 0.07x, +67.3%)	ok
mathTranscendental	3	0.99x (base 1.01x, -1.8%)	0.12x (base 0.12x, -0.3%)	ok
arraySequential	3	0.45x (base 0.42x, +7.6%)	0.53x (base 0.53x, +0.5%)	ok
arrayRandom	3	0.98x (base 0.99x, -0.9%)	0.33x (base 0.32x, +0.8%)	ok
objectAllocation	3	1.04x (base 1.11x, -6.4%)	0.72x (base 0.72x, -1.2%)	ok
valueEscape	3	0.51x (base 0.51x, +0.2%)	0.08x (base 0.09x, -9.3%)	ok
hashMapChurn	3	1.03x (base 1.18x, -12.3%)	0.06x (base 0.07x, -5.1%)	ok
stringBuilding	3	0.99x (base 0.84x, +18.1%)	0.40x (base 0.46x, -14.2%)	ok
recursion	3	1.23x (base 1.24x, -0.6%)	0.12x (base 0.12x, -0.8%)	ok
quicksort	3	1.00x (base 1.01x, -1.5%)	0.11x (base 0.11x, +0.2%)	ok

Result: no regression

…rd covers the Compose screens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ows KmpCompat goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ith their implementors JVMS 5.5 initializes a superinterface declaring a default method together with any class implementing it. The JS runtime only initialized the superclass chain, and a default method reads its own interface's statics without an init guard, so Compose's MonotonicFrameClock.getKey() (= Key) answered null; CombinedContext.minusKey(null) then failed Kotlin's parameter check, whose message builder indexed an empty stack trace (AIOOBE 0 in every KmpCompat screenshot test). The translator now flags such interfaces (D: 1) and ensureClassInitialized and its suspending twin initialize them after the base class. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-26T10:47:59Z

Compared 210 screenshots: 210 matched.
Native Windows port, REAL shipping pipeline: the hellocodenameone screenshot suite rendered by a binary CROSS-COMPILED on Linux (clang-cl + xwin, WebView2 linked) and RUN on a Windows x64 runner. Compared against the in-repo baseline in scripts/windows/screenshots.

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	SSE2 (x64) / NEON (arm64) native kernels
SIMD int-add (64K x300)	java 52ms / native 4ms = 13.0x speedup
SIMD float-mul (64K x300)	java 53ms / native 4ms = 13.2x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 native bridge	unavailable (CN1 + SIMD + image benchmarks only)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	71.000 ms
Base64 CN1 decode	85.000 ms
Base64 SIMD encode	99.000 ms
Base64 encode ratio (SIMD/CN1)	1.394x (39.4% slower)
Base64 SIMD decode	96.000 ms
Base64 decode ratio (SIMD/CN1)	1.129x (12.9% slower)
Image encode benchmark iterations	100
Image createMask (SIMD off)	9.000 ms
Image createMask (SIMD on)	5.000 ms
Image createMask ratio (SIMD on/off)	0.556x (44.4% faster)
Image applyMask (SIMD off)	32.000 ms
Image applyMask (SIMD on)	31.000 ms
Image applyMask ratio (SIMD on/off)	0.969x (3.1% faster)
Image modifyAlpha (SIMD off)	37.000 ms
Image modifyAlpha (SIMD on)	27.000 ms
Image modifyAlpha ratio (SIMD on/off)	0.730x (27.0% faster)
Image modifyAlpha removeColor (SIMD off)	39.000 ms
Image modifyAlpha removeColor (SIMD on)	20.000 ms
Image modifyAlpha removeColor ratio (SIMD on/off)	0.513x (48.7% faster)

…routines' stdlib; JS KmpCompat goldens; guide terms Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog · 2026-10-26T13:17:54Z

Compared 231 screenshots: 231 matched.
✅ JavaScript-port screenshot tests passed.

…lib; arm64 Linux suite gets swap; Android KmpCompat goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

# Conflicts: # docs/developer-guide/languagetool-accept.txt

shai-almog · 2026-10-26T18:56:08Z

Compared 195 screenshots: 195 matched.

Native Android coverage

📊 Line coverage: 19.18% (55952/291705 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 18.14% (269515/1486140), branch 12.40% (19602/158078), complexity 10.35% (15773/152375), method 15.70% (11356/72309), class 27.90% (2232/7999)
- Lowest covered classes
  - kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2396 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.ClassReader – 0.00% (0/1524 lines covered)
  - androidx.compose.runtime.androidx.compose.runtime.LinkComposer – 0.00% (0/1430 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlinx.coroutines.channels.kotlinx.coroutines.channels.BufferedChannel – 0.00% (0/863 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/744 lines covered)
  - com.google.common.cache.com.google.common.cache.LocalCache$Segment – 0.00% (0/726 lines covered)
  - okio.okio.Buffer – 0.00% (0/687 lines covered)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/630 lines covered)
  - com.codename1.androidcompat.rt.com.codename1.androidcompat.rt.TextXmlPullParser – 0.00% (0/623 lines covered)

✅ Native Android screenshot tests passed.

Native Android coverage

📊 Line coverage: 19.18% (55952/291705 lines covered) [HTML preview] (artifact android-coverage-report, jacocoAndroidReport/html/index.html)
- Other counters: instruction 18.14% (269515/1486140), branch 12.40% (19602/158078), complexity 10.35% (15773/152375), method 15.70% (11356/72309), class 27.90% (2232/7999)
- Lowest covered classes
  - kotlin.collections.unsigned.kotlin.collections.unsigned.UArraysKt___UArraysKt – 0.00% (0/2396 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.ClassReader – 0.00% (0/1524 lines covered)
  - androidx.compose.runtime.androidx.compose.runtime.LinkComposer – 0.00% (0/1430 lines covered)
  - org.jacoco.agent.rt.internal_0e20598.asm.org.jacoco.agent.rt.internal_0e20598.asm.MethodWriter – 0.00% (0/922 lines covered)
  - kotlinx.coroutines.channels.kotlinx.coroutines.channels.BufferedChannel – 0.00% (0/863 lines covered)
  - kotlin.sequences.kotlin.sequences.SequencesKt___SequencesKt – 0.00% (0/744 lines covered)
  - com.google.common.cache.com.google.common.cache.LocalCache$Segment – 0.00% (0/726 lines covered)
  - okio.okio.Buffer – 0.00% (0/687 lines covered)
  - kotlin.text.kotlin.text.StringsKt___StringsKt – 0.00% (0/630 lines covered)
  - com.codename1.androidcompat.rt.com.codename1.androidcompat.rt.TextXmlPullParser – 0.00% (0/623 lines covered)

Benchmark Results

Detailed Performance Metrics

Metric	Duration
SIMD kernel backend	scalar fallback (no native SIMD)
SIMD int-add (64K x300)	java 82ms / native 80ms = 1.0x speedup
SIMD float-mul (64K x300)	java 80ms / native 57ms = 1.4x speedup
SIMD kernel correctness	PASS (native result == scalar reference)
Base64 payload size	8192 bytes
Base64 benchmark iterations	6000
Base64 SIMD byte path	gated to scalar (CPU autovectorizes scalar; explicit SIMD not beneficial here)
Base64 CN1 encode	52.000 ms
Base64 CN1 decode	51.000 ms
Base64 native encode	312.000 ms
Base64 encode ratio (CN1/native)	0.167x (83.3% faster)
Base64 native decode	189.000 ms
Base64 decode ratio (CN1/native)	0.270x (73.0% faster)
Image encode benchmark status	skipped (SIMD unsupported)

…ass removed An application that never reaches a lowered updater lost the owner class and its header, and the Linux demo build then failed on a missing coroutines header. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog and others added 2 commits October 25, 2026 21:12

ci: KMP tests mapped to a port-status feature; copyright headers

1d82250

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog and others added 2 commits October 25, 2026 21:35

ci: install compose-compat where hellocodenameone builds on a partial…

fd4dbcb

… reactor; guide snippets by tag Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: copyright header on the KMP guide snippet

afb0656

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog and others added 2 commits October 26, 2026 03:55

ci: KMP on every target - stage kotlinx/Kotlin 2 for native and JS, A…

e513247

…ndroid duplicate classes, guide snippets, mac goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ci: guide workflows watch the KMP snippet tree; Android keeps the app…

e1a2ea2

…'s coroutines version Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Merge remote-tracking branch 'origin/master' into kmp-compose-compat

816bfd5

# Conflicts: # .github/workflows/developer-guide-docs.yml # scripts/copyright-header-exclusions.txt

ci: Android strips the coroutines jar's _COROUTINE frames too; guide …

f81fd99

…names real animate functions Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog and others added 4 commits October 26, 2026 11:13

ParparVM on Windows opens long and non-ASCII paths; hello C build gua…

9ac1593

…rd covers the Compose screens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

compose-compat drops the coroutines metadata-only root artifact; Wind…

a911a2f

…ows KmpCompat goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

js runtime: say where superclass interfaces are initialized

e9dd9a5

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Android: Kotlin apps default to a compiler that reads the declared co…

bc371cd

…routines' stdlib; JS KmpCompat goldens; guide terms Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

shai-almog and others added 2 commits October 26, 2026 19:57

Android raises a pinned Kotlin older than the shipped coroutines' std…

6e41bfc

…lib; arm64 Linux suite gets swap; Android KmpCompat goldens Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Merge remote-tracking branch 'origin/master' into kmp-compose-compat

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# Conflicts: # docs/developer-guide/languagetool-accept.txt

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