[nulltask]

Summary

• drawPointCloud computes the cloud's scale, yaw/pitch cosines and camera basis once per cloud and projects each point with projectCloudPointInto into a reused result, instead of building four intermediate vectors per point.
• renderBomb computes the spin's cosine and sine once per bomb and projects its fountain and skirt grains with burstParticlePositionInto / projectYawedInto into reused results.
• The light rivers (play and select) use particleRiverPointInto and projectViewInto with the frame's camera basis instead of particleRiverPoint → viewPoint → projectPoint with object spreads.
• drawSchool takes project(out, point) and keeps six scratch results, so the mantas' six projections per fish no longer allocate; both callers project through projectViewInto.
• The new helpers do the same arithmetic as the composed ones; tests check exact equality against projectPoint(viewPoint(rotateX(rotateY(…)))), burstParticlePosition, projectPoint(rotateY(…)) and particleRiverPoint over random inputs.

Measurements

Node micro-benchmark, same inputs:

Case	Before	After
Point cloud, 2000 points	41.1 µs	26.9 µs
Bomb, 200 grains	6.2 µs	4.7 µs

Browser, unminified build, dense 8-key stress chart on AUTO with Synesthesia, mean requestAnimationFrame callback time over 10 s (≈1200 frames), three alternating runs:

Build	Runs (ms/frame)	Mean
devel	2.36 / 2.21 / 2.24	2.27
this PR	2.19 / 2.20 / 2.18	2.19

Test plan

• pnpm run check
• pnpm test (7203 passed)

🤖 Generated with Claude Code

[github-actions]

Exports Benchmark

✅ No significant change · 4 within noise · 98 compared

_{1135efad → 6e67bd0a · 3 runs base / 3 runs head · a regression or improvement is a change past ±8% whose runs do not overlap · times are per call (median)}

Changed packages

player-browser: 98 cases compared, median 0.1% faster.

All 98 cases

API	Base	Head	Change	Run spread (base / head)
player-browser.applySilentModePlayback	14.1 ns	14.2 ns	0.8% slower	±0.4% / ±1.3%
player-browser.applySystemAudioSessionType	12.9 ns	13.0 ns	0.8% slower	±0.2% / ±1.7%
player-browser.asLoadedBytes	7.94 ns	7.89 ns	0.6% faster	±0.6% / ±2.4%
player-browser.blendCodeToPixi	6.32 ns	6.27 ns	0.9% faster	±0.6% / ±2.6%
player-browser.BrowserChartCollectionStore	2.49 ms	2.50 ms	0.5% slower	±0.4% / ±0.6%
player-browser.buildAudioBus	2.56 µs	2.55 µs	0.2% faster	±0.5% / ±1.1%
player-browser.chartPlayVariantForBeatorajaVariant	6.01 ns	6.02 ns	0.2% slower	±0.8% / ±1.9%
player-browser.ChartPreviewEngine	242 ns	282 ns	16.3% slower ·	±23.0% / ±24.4%
player-browser.checkBrowserCompat	155 ns	153 ns	1.3% faster	±2.5% / ±0.9%
player-browser.computeChartFileHashes	54.9 µs	54.9 µs	±0.0%	±2.0% / ±2.6%
player-browser.computeChartFileSHA256	46.9 µs	51.4 µs	9.7% slower ·	±2.6% / ±3.7%
player-browser.computeSHA256Hex	44.5 µs	44.0 µs	1.2% faster	±2.2% / ±1.7%
player-browser.createAudioService	6.98 µs	6.80 µs	2.6% faster	±2.0% / ±8.4%
player-browser.createBeatorajaSceneKitCaches	78.1 ns	79.7 ns	2.1% slower	±6.3% / ±6.5%
player-browser.createBeMusicSkinRegistry	1.07 µs	1.09 µs	1.2% slower	±1.9% / ±0.2%
player-browser.createChartHashLookup	143 ns	140 ns	1.6% faster	±0.6% / ±2.1%
player-browser.createCourseChartRecord	1.58 µs	1.57 µs	0.7% faster	±0.4% / ±1.3%
player-browser.createCroppedBeatorajaTexture	6.56 ns	6.76 ns	3.0% slower	±0.3% / ±2.9%
player-browser.createDecideScene	281 µs	249 µs	11.3% faster ·	±6.7% / ±8.4%
player-browser.createEagerDropPathPredicate	968 ns	970 ns	0.3% slower	±1.6% / ±0.1%
player-browser.createNewCourseEntry	9.97 ns	9.85 ns	1.2% faster	±2.4% / ±0.6%
player-browser.createNonstopAssets	17.7 µs	17.7 µs	0.1% faster	±0.6% / ±0.4%
player-browser.createPlayScene	160 µs	159 µs	0.8% faster	±2.9% / ±5.2%
player-browser.createRandomCourseEntry	1.47 µs	1.45 µs	1.0% faster	±0.3% / ±4.0%
player-browser.createResultScene	48.1 µs	51.7 µs	7.4% slower	±7.3% / ±1.3%
player-browser.createSelectController	13.5 µs	13.6 µs	0.8% slower	±0.2% / ±0.2%
player-browser.createSelectScene	46.0 µs	47.0 µs	2.3% slower	±1.1% / ±2.9%
player-browser.createSkinFamilyRegistry	196 ns	194 ns	0.8% faster	±0.6% / ±1.3%
player-browser.defaultBrowserWorkerCount	6.06 ns	6.15 ns	1.5% slower	±0.4% / ±1.5%
player-browser.DeferredDroppedFile	2.55 µs	2.57 µs	0.8% slower	±0.7% / ±1.5%
player-browser.describeChartCollection	7.86 ns	7.90 ns	0.5% slower	±0.6% / ±2.3%
player-browser.describeRecordingFormat	6.32 ns	6.48 ns	2.5% slower	±2.0% / ±2.9%
player-browser.drawBrowserRandomCourse	4.86 µs	4.82 µs	1.0% faster	±0.2% / ±0.8%
player-browser.executeBrowserTask	9.27 µs	9.22 µs	0.5% faster	±7.2% / ±4.6%
player-browser.findBeatorajaThemeBGM	3.12 µs	3.11 µs	0.3% faster	±0.5% / ±0.4%
player-browser.flipRectToPixi	5.98 ns	6.15 ns	2.8% slower	±0.4% / ±1.1%
player-browser.getBrowserWorkerCount	6.16 ns	6.20 ns	0.6% slower	±0.5% / ±8.3%
player-browser.getMasterVolume	6.24 ns	6.26 ns	0.3% slower	±1.3% / ±0.5%
player-browser.getSystemAudioSession	7.20 ns	7.27 ns	1.1% slower	±0.3% / ±2.5%
player-browser.isBeatorajaLuaSkinFilePath	41.1 ns	41.0 ns	0.1% faster	±0.7% / ±0.3%
player-browser.isBeatorajaSkinIndicator	136 ns	136 ns	0.1% faster	±0.7% / ±0.2%
player-browser.isChartFilePath	35.5 ns	35.4 ns	0.2% faster	±0.3% / ±0.1%
player-browser.isCourseFilePath	481 ns	482 ns	0.4% slower	±1.2% / ±0.5%
player-browser.isLR2SkinFilePath	41.0 ns	41.4 ns	1.1% slower	±0.1% / ±1.5%
player-browser.loadAssetBytes	243 ns	237 ns	2.3% faster	±2.3% / ±0.9%
player-browser.loadBeatorajaChartImages	568 ns	556 ns	2.1% faster	±1.0% / ±4.4%
player-browser.loadBeatorajaFonts	636 ns	624 ns	1.9% faster	±13.0% / ±1.5%
player-browser.loadBeatorajaSceneKit	16.6 µs	16.6 µs	±0.0%	±0.3% / ±0.7%
player-browser.loadBeatorajaTexturesFromBundle	331 ns	334 ns	1.1% slower	±4.5% / ±0.6%
player-browser.loadBeatorajaThemeFromFiles	594 ns	582 ns	2.0% faster	±3.1% / ±3.9%
player-browser.loadChartCollectionFromDrop	1.22 ms	1.22 ms	0.2% faster	±0.4% / ±0.9%
player-browser.loadChartCollectionFromFiles	1.22 ms	1.21 ms	0.3% faster	±0.2% / ±0.9%
player-browser.logger	11.0 ns	10.9 ns	1.0% faster	±0.2% / ±1.4%
player-browser.masterOutput	13.1 ns	13.1 ns	0.3% faster	±1.1% / ±0.6%
player-browser.materializeDroppedFiles	1.88 µs	1.89 µs	0.5% slower	±0.5% / ±0.7%
player-browser.md5HexOfBytes	744 ns	747 ns	0.4% slower	±0.3% / ±1.9%
player-browser.mergeCompressorParams	110 ns	109 ns	1.4% faster	±2.1% / ±2.3%
player-browser.normalizeBrowserWorkerCount	6.16 ns	6.15 ns	0.1% faster	±0.6% / ±1.6%
player-browser.parseCompressorMode	18.1 ns	18.1 ns	0.1% faster	±0.3% / ±0.2%
player-browser.pickBeatorajaPlayableSkinVariant	20.6 ns	20.6 ns	0.2% slower	±1.2% / ±0.5%
player-browser.pickBeatorajaPlayableVariant	6.27 ns	6.25 ns	0.2% faster	±1.6% / ±2.9%
player-browser.pickRecorderMIMEType	782 ns	776 ns	0.8% faster	±1.0% / ±0.6%
player-browser.readCourseFile	4.67 µs	4.70 µs	0.5% slower	±0.3% / ±0.3%
player-browser.readDroppedFiles	242 ns	244 ns	0.8% slower	±1.8% / ±0.8%
player-browser.readFilesIntoBytesMap	4.37 µs	4.43 µs	1.2% slower (I/O)	±1.6% / ±1.0%
player-browser.recorderMIMECandidates	1.90 µs	1.89 µs	0.1% faster	±0.5% / ±0.7%
player-browser.recordingAudioCodecs	6.23 ns	6.15 ns	1.3% faster	±1.0% / ±2.4%
player-browser.recordingFileExtension	34.8 ns	34.9 ns	0.1% slower	±0.4% / ±0.4%
player-browser.recordingVideoCodecs	52.1 ns	52.1 ns	±0.0%	±2.0% / ±0.8%
player-browser.Rectangle	6.26 ns	6.26 ns	±0.0%	±0.8% / ±1.8%
player-browser.releaseBeatorajaSceneKitAssets	131 ns	132 ns	0.4% slower	±1.5% / ±0.7%
player-browser.resolveBeatorajaChartImage	6.24 ns	6.21 ns	0.5% faster	±0.5% / ±2.7%
player-browser.resolveBeatorajaSkinConfig	130 ns	130 ns	0.3% slower	±0.9% / ±1.3%
player-browser.resolveCaptureSize	6.34 ns	6.29 ns	0.8% faster	±1.2% / ±1.7%
player-browser.resolveChartAsset	2.46 µs	2.47 µs	0.5% slower	±0.8% / ±0.4%
player-browser.resolveChartAudioAsset	10.6 µs	10.6 µs	0.3% slower	±0.7% / ±0.8%
player-browser.resolveChartBGAAsset	49.2 µs	48.8 µs	0.8% faster	±0.2% / ±0.6%
player-browser.resolveChartImageAsset	5.38 µs	5.33 µs	0.9% faster	±0.4% / ±0.9%
player-browser.resolveChartSource	8.77 ns	8.74 ns	0.3% faster	±0.8% / ±2.2%
player-browser.resolveCourseFolders	164 ns	166 ns	1.2% slower	±1.6% / ±1.7%
player-browser.resolveCourseMakerFolders	498 ns	497 ns	0.2% faster	±2.4% / ±1.4%
player-browser.resolveDropFilePath	196 ns	196 ns	0.2% faster	±0.2% / ±0.4%
player-browser.resolveFrameTimestamp	6.24 ns	6.18 ns	1.0% faster	±0.1% / ±1.7%
player-browser.resolveRendererPreference	145 ns	146 ns	0.2% slower	±1.9% / ±2.2%
player-browser.resolveRenderResolution	196 ns	195 ns	0.1% faster	±1.9% / ±1.0%
player-browser.resolveSelectListWindow	11.4 ns	11.3 ns	0.5% faster	±1.0% / ±0.3%
player-browser.resolveSilentModeAudioSessionType	6.15 ns	6.12 ns	0.5% faster	±0.3% / ±2.0%
player-browser.runBrowserTask	1.07 ms	1.07 ms	0.2% faster	±0.1% / ±0.1%
player-browser.sanitizeBusVolume	6.51 ns	6.44 ns	1.2% faster	±0.7% / ±1.7%
player-browser.sanitizeMasterVolume	6.66 ns	6.59 ns	1.0% faster	±1.8% / ±2.0%
player-browser.SessionScene	578 ns	574 ns	0.6% faster	±0.8% / ±1.3%
player-browser.setMasterVolume	403 µs	492 µs	22.1% slower ·	±10.6% / ±15.8%
player-browser.shouldCaptureFrame	6.27 ns	6.22 ns	0.7% faster	±0.4% / ±2.0%
player-browser.splitDroppedChartAndThemeFiles	2.59 µs	2.60 µs	0.2% slower	±0.5% / ±0.9%
player-browser.summarizeBeatorajaPlaySkins	122 ns	122 ns	0.2% faster	±0.6% / ±0.6%
player-browser.summarizeBrowserCompat	68.0 ns	67.5 ns	0.6% faster	±12.0% / ±0.7%
player-browser.supportsSystemAudioSession	8.07 ns	8.02 ns	0.7% faster	±0.3% / ±2.0%
player-browser.supportsWebCodecsRecording	11.2 ns	11.1 ns	0.7% faster	±0.5% / ±0.9%

Within noise (4): past the threshold, but the runs overlap

API	Base	Head	Change	Run spread (base / head)
player-browser.setMasterVolume	403 µs	492 µs	22.1% slower	±10.6% / ±15.8%
player-browser.ChartPreviewEngine	242 ns	282 ns	16.3% slower	±23.0% / ±24.4%
player-browser.createDecideScene	281 µs	249 µs	11.3% faster	±6.7% / ±8.4%
player-browser.computeChartFileSHA256	46.9 µs	51.4 µs	9.7% slower	±2.6% / ±3.7%

I/O-bound, not judged (1)

These cases touch the filesystem, so their time follows the OS cache and the disk more than the code.

API	Base	Head	Change	Run spread (base / head)
player-browser.readFilesIntoBytesMap	4.37 µs	4.43 µs	1.2% slower	±1.6% / ±1.0%

Excluded: too fast to time (10)

A timed sample lasted 1 µs or less on at least one side (usually a base commit from before calls were batched), so its time is timer noise and no change is shown.

API	Base	Head
player-browser.alignAudioChunk	0.392 ns	0.386 ns
player-browser.applyBeatorajaStretchRect	28.4 ns	26.7 ns
player-browser.CourseMaker	88.0 ns	85.3 ns
player-browser.createBeatorajaSkinLoadContext	181 ns	195 ns
player-browser.defaultBeatorajaSkinConfig	25.7 ns	25.8 ns
player-browser.destinationToSpriteProps	79.1 ns	79.1 ns
player-browser.GameplayRecorder	81.8 ns	79.1 ns
player-browser.resolveCourseEntry	57.5 ns	57.5 ns
player-browser.SceneController	259 ns	259 ns
player-browser.setBrowserWorkerCount	38.9 ns	38.4 ns

Run details

Measure	Value
Median change (all compared cases)	+0.14%
Mean change	-0.25%
Overall verdict (median vs. threshold)	unchanged
Compared / within noise / I/O-bound / unchanged	98 / 4 / 1 / 93
Benchmarked / skipped (head)	108 / 6
Time / warmup per case	50 ms / 25 ms
Node / platform	v26.12.1 / linux