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test: capture brush timing diagnostics on Ubuntu

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This commit is contained in:
Alexandre Teixeira
2026-10-29 18:16:49 +00:00
parent 0eb6b9eb1d
commit 9997b2d96d
2 changed files with 79 additions and 0 deletions
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tests/e2e/photo-editor/brush-engine.spec.js
+5
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@@ -69,6 +69,8 @@ test('long sampled strokes stay responsive and undo atomically', async ({ page,
const metrics = browserName === 'chromium' ? await page.context().newCDPSession(page) : null;
if (metrics) await metrics.send('Performance.enable');
const taskTime = async () => (await metrics.send('Performance.getMetrics')).metrics.find(item => item.name === 'TaskDuration').value *1000;
const metricSnapshot = async () => Object.fromEntries((await metrics.send('Performance.getMetrics')).metrics.filter(x => ['TaskDuration','ScriptDuration','LayoutDuration','RecalcStyleDuration'].includes(x.name)).map(x => [x.name, x.value * 1000]));
const beforeMetrics = metrics ? await metricSnapshot() : {};
const beforeTask = metrics ? await taskTime() : null;
const startedAt = Date.now();
await page.mouse.move(start.x, start.y);
@@ -76,7 +78,10 @@ test('long sampled strokes stay responsive and undo atomically', async ({ page,
await page.mouse.move(end.x, end.y, { steps: 240 });
await page.mouse.up();
const strokeDuration = Date.now() - startedAt;
if (process.env.BRUSH_DIAGNOSTIC_STALL === '1') await page.evaluate(() => { const until = performance.now() + 6000; while (performance.now() < until) {} });
const mainThreadDuration = metrics ? (await taskTime()) - beforeTask : null;
const afterMetrics = metrics ? await metricSnapshot() : {};
console.log('BRUSH_DIAGNOSTIC ' + JSON.stringify({mode: process.env.BRUSH_DIAGNOSTIC_MODE, samples: 240, strokeDuration, controlDuration, mainThreadDuration, breakdown: Object.fromEntries(Object.keys(beforeMetrics).map(k => [k, afterMetrics[k] - beforeMetrics[k]]))}));
if (metrics) await metrics.detach();
await testInfo.attach('stroke-timing', { body: Buffer.from(JSON.stringify({
samples: 240, strokeDuration, controlDuration, mainThreadDuration,