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* perf(renderer): avoid per-second spinner animation events * fix(bench): ensure the Electron runtime before bench:spinners The script launches Electron via Playwright but skipped ensure:electron-runtime, which every other Electron-launching bench script runs first. * docs(renderer): scope spinner pixel-tolerance claim to paused-animation checks --------- Co-authored-by: m4air <m4air@m4airs-MacBook-Air.local> Co-authored-by: pullfrog[bot] <226033991+pullfrog[bot]@users.noreply.github.com>
34 lines
1.0 KiB
JavaScript
34 lines
1.0 KiB
JavaScript
import { writeFileSync } from 'node:fs'
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export async function traceIterations(cdp, outputPath, durationMs = 2200) {
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await cdp.send('Tracing.start', {
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categories: 'devtools.timeline',
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transferMode: 'ReturnAsStream'
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})
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await new Promise((resolve) => setTimeout(resolve, durationMs))
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const completion = new Promise((resolve) => cdp.once('Tracing.tracingComplete', resolve))
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await cdp.send('Tracing.end')
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const { stream } = await completion
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let json = ''
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try {
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while (true) {
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const part = await cdp.send('IO.read', { handle: stream })
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json += part.data
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if (part.eof) {
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break
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}
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}
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} finally {
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await cdp.send('IO.close', { handle: stream })
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}
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writeFileSync(outputPath, json)
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const events = JSON.parse(json).traceEvents
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return {
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durationMs,
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iterationEvents: events.filter(
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(event) => event.name === 'EventDispatch' && event.args?.data?.type === 'animationiteration'
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).length,
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styleUpdates: events.filter((event) => event.name === 'UpdateLayoutTree').length
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}
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}
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