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feat(tracing): add long animation frame tracing (#12646)
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Adds an option to trace long animation frames as per #11719. This
tracing feature is disabled by default.

Currently, this feature
https://developer.mozilla.org/en-US/docs/Web/API/Performance_API/Long_animation_frame_timing
is only supported by Chromium browsers.

Usage is opt-in:

```js
Sentry.init({
  dsn: '__PUBLIC_DSN__',
  integrations: [
    Sentry.browserTracingIntegration({
      enableLongAnimationFrame: true,
    }),
  ],
  tracesSampleRate: 1,
});
```
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KevinL10 authored Jul 10, 2024
1 parent 196fc09 commit 2f04224
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2 changes: 1 addition & 1 deletion .size-limit.js
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Expand Up @@ -177,7 +177,7 @@ module.exports = [
path: createCDNPath('bundle.tracing.replay.min.js'),
gzip: false,
brotli: false,
limit: '220 KB',
limit: '221 KB',
},
{
name: 'CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed',
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(() => {
const startTime = Date.now();

function getElasped() {
const time = Date.now();
return time - startTime;
}

while (getElasped() < 101) {
//
}
})();
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import * as Sentry from '@sentry/browser';

window.Sentry = Sentry;

Sentry.init({
dsn: 'https://public@dsn.ingest.sentry.io/1337',
integrations: [
Sentry.browserTracingIntegration({ enableLongTask: false, enableLongAnimationFrame: false, idleTimeout: 9000 }),
],
tracesSampleRate: 1,
});
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
</head>
<body>
<div>Rendered Before Long Animation Frame</div>
<script src="https://example.com/path/to/script.js"></script>
</body>
</html>
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import type { Route } from '@playwright/test';
import { expect } from '@playwright/test';
import type { Event } from '@sentry/types';

import { sentryTest } from '../../../../utils/fixtures';
import { getFirstSentryEnvelopeRequest, shouldSkipTracingTest } from '../../../../utils/helpers';

sentryTest(
'should not capture long animation frame when flag is disabled.',
async ({ browserName, getLocalTestPath, page }) => {
// Long animation frames only work on chrome
if (shouldSkipTracingTest() || browserName !== 'chromium') {
sentryTest.skip();
}

await page.route('**/path/to/script.js', (route: Route) =>
route.fulfill({ path: `${__dirname}/assets/script.js` }),
);

const url = await getLocalTestPath({ testDir: __dirname });

const eventData = await getFirstSentryEnvelopeRequest<Event>(page, url);
const uiSpans = eventData.spans?.filter(({ op }) => op?.startsWith('ui'));

expect(uiSpans?.length).toBe(0);
},
);
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function getElapsed(startTime) {
const time = Date.now();
return time - startTime;
}

function handleClick() {
const startTime = Date.now();
while (getElapsed(startTime) < 105) {
//
}
}

function start() {
const startTime = Date.now();
while (getElapsed(startTime) < 105) {
//
}
}

// trigger 2 long-animation-frame events
// one from the top-level and the other from an event-listener
start();

const button = document.getElementById('clickme');
button.addEventListener('click', handleClick);
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import * as Sentry from '@sentry/browser';

window.Sentry = Sentry;

Sentry.init({
dsn: 'https://public@dsn.ingest.sentry.io/1337',
integrations: [
Sentry.browserTracingIntegration({
idleTimeout: 9000,
enableLongTask: false,
enableLongAnimationFrame: true,
}),
],
tracesSampleRate: 1,
});
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
</head>
<body>
<div>Rendered Before Long Animation Frame</div>
<button id="clickme">
click me to start the long animation!
</button>
<script src="https://example.com/path/to/script.js"></script>
</body>
</html>
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import type { Route } from '@playwright/test';
import { expect } from '@playwright/test';
import type { Event } from '@sentry/types';

import { SEMANTIC_ATTRIBUTE_SENTRY_OP, SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN } from '@sentry/browser';
import { sentryTest } from '../../../../utils/fixtures';
import { getFirstSentryEnvelopeRequest, shouldSkipTracingTest } from '../../../../utils/helpers';

sentryTest(
'should capture long animation frame for top-level script.',
async ({ browserName, getLocalTestPath, page }) => {
// Long animation frames only work on chrome
if (shouldSkipTracingTest() || browserName !== 'chromium') {
sentryTest.skip();
}

await page.route('**/path/to/script.js', (route: Route) =>
route.fulfill({ path: `${__dirname}/assets/script.js` }),
);

const url = await getLocalTestPath({ testDir: __dirname });

const promise = getFirstSentryEnvelopeRequest<Event>(page);

await page.goto(url);

await new Promise(resolve => setTimeout(resolve, 1000));

const eventData = await promise;

const uiSpans = eventData.spans?.filter(({ op }) => op?.startsWith('ui.long-animation-frame'));

expect(uiSpans?.length).toEqual(1);

const [topLevelUISpan] = uiSpans || [];
expect(topLevelUISpan).toEqual(
expect.objectContaining({
op: 'ui.long-animation-frame',
description: 'Main UI thread blocked',
parent_span_id: eventData.contexts?.trace?.span_id,
data: {
'code.filepath': 'https://example.com/path/to/script.js',
'browser.script.source_char_position': 0,
'browser.script.invoker': 'https://example.com/path/to/script.js',
'browser.script.invoker_type': 'classic-script',
[SEMANTIC_ATTRIBUTE_SENTRY_OP]: 'ui.long-animation-frame',
[SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: 'auto.ui.browser.metrics',
},
}),
);
const start = topLevelUISpan.start_timestamp ?? 0;
const end = topLevelUISpan.timestamp ?? 0;
const duration = end - start;

expect(duration).toBeGreaterThanOrEqual(0.1);
expect(duration).toBeLessThanOrEqual(0.15);
},
);

sentryTest(
'should capture long animation frame for event listener.',
async ({ browserName, getLocalTestPath, page }) => {
// Long animation frames only work on chrome
if (shouldSkipTracingTest() || browserName !== 'chromium') {
sentryTest.skip();
}

await page.route('**/path/to/script.js', (route: Route) =>
route.fulfill({ path: `${__dirname}/assets/script.js` }),
);

const url = await getLocalTestPath({ testDir: __dirname });

const promise = getFirstSentryEnvelopeRequest<Event>(page);

await page.goto(url);

// trigger long animation frame function
await page.getByRole('button').click();

await new Promise(resolve => setTimeout(resolve, 1000));

const eventData = await promise;

const uiSpans = eventData.spans?.filter(({ op }) => op?.startsWith('ui.long-animation-frame'));

expect(uiSpans?.length).toEqual(2);

// ignore the first ui span (top-level long animation frame)
const [, eventListenerUISpan] = uiSpans || [];

expect(eventListenerUISpan).toEqual(
expect.objectContaining({
op: 'ui.long-animation-frame',
description: 'Main UI thread blocked',
parent_span_id: eventData.contexts?.trace?.span_id,
data: {
'browser.script.invoker': 'BUTTON#clickme.onclick',
'browser.script.invoker_type': 'event-listener',
[SEMANTIC_ATTRIBUTE_SENTRY_OP]: 'ui.long-animation-frame',
[SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: 'auto.ui.browser.metrics',
},
}),
);
const start = eventListenerUISpan.start_timestamp ?? 0;
const end = eventListenerUISpan.timestamp ?? 0;
const duration = end - start;

expect(duration).toBeGreaterThanOrEqual(0.1);
expect(duration).toBeLessThanOrEqual(0.15);
},
);
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(() => {
const startTime = Date.now();

function getElasped() {
const time = Date.now();
return time - startTime;
}

while (getElasped() < 101) {
//
}
})();
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@@ -0,0 +1,11 @@
import * as Sentry from '@sentry/browser';

window.Sentry = Sentry;

Sentry.init({
dsn: 'https://public@dsn.ingest.sentry.io/1337',
integrations: [
Sentry.browserTracingIntegration({ enableLongTask: true, enableLongAnimationFrame: true, idleTimeout: 9000 }),
],
tracesSampleRate: 1,
});
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
</head>
<body>
<div>Rendered Before Long Task</div>
<script src="https://example.com/path/to/script.js"></script>
</body>
</html>
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import type { Route } from '@playwright/test';
import { expect } from '@playwright/test';
import type { Event } from '@sentry/types';

import { sentryTest } from '../../../../utils/fixtures';
import { getFirstSentryEnvelopeRequest, shouldSkipTracingTest } from '../../../../utils/helpers';

sentryTest(
'should not capture long animation frame or long task when browser is non-chromium',
async ({ browserName, getLocalTestPath, page }) => {
// Only test non-chromium browsers
if (shouldSkipTracingTest() || browserName === 'chromium') {
sentryTest.skip();
}

await page.route('**/path/to/script.js', (route: Route) =>
route.fulfill({ path: `${__dirname}/assets/script.js` }),
);

const url = await getLocalTestPath({ testDir: __dirname });

const eventData = await getFirstSentryEnvelopeRequest<Event>(page, url);
const uiSpans = eventData.spans?.filter(({ op }) => op?.startsWith('ui'));

expect(uiSpans?.length).toBe(0);
},
);
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@@ -0,0 +1,25 @@
function getElapsed(startTime) {
const time = Date.now();
return time - startTime;
}

function handleClick() {
const startTime = Date.now();
while (getElapsed(startTime) < 105) {
//
}
}

function start() {
const startTime = Date.now();
while (getElapsed(startTime) < 105) {
//
}
}

// trigger 2 long-animation-frame events
// one from the top-level and the other from an event-listener
start();

const button = document.getElementById('clickme');
button.addEventListener('click', handleClick);
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@@ -0,0 +1,15 @@
import * as Sentry from '@sentry/browser';

window.Sentry = Sentry;

Sentry.init({
dsn: 'https://public@dsn.ingest.sentry.io/1337',
integrations: [
Sentry.browserTracingIntegration({
idleTimeout: 9000,
enableLongTask: true,
enableLongAnimationFrame: true,
}),
],
tracesSampleRate: 1,
});
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@@ -0,0 +1,13 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
</head>
<body>
<div>Rendered Before Long Animation Frame</div>
<button id="clickme">
click me to start the long animation!
</button>
<script src="https://example.com/path/to/script.js"></script>
</body>
</html>
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