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fix(browser): Use drift-corrected time origin for INP, replay and profiling - #23067

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Lms24 wants to merge 1 commit into
lms/fix-core-browser-timestampInSeconds-offset-clockdriftfrom
lms/fix-browser-live-performance-time-origin
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Lms24 wants to merge 1 commit into
lms/fix-core-browser-timestampInSeconds-offset-clockdriftfrom
lms/fix-browser-live-performance-time-origin

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@Lms24

@Lms24 Lms24 commented Aug 5, 2026 •

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

Fix All in Cursor

❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.

Reviewed by Cursor Bugbot for commit 25c1b28. Configure here.

Comment thread packages/browser/src/profiling/utils.ts Outdated
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github-actions Bot commented Aug 5, 2026 •

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size-limit report 📦

Path Size % Change Change
@sentry/browser 29.28 kB +0.16% +45 B 🔺
@sentry/browser - with treeshaking flags 27.55 kB +0.16% +43 B 🔺
@sentry/browser - with treeshaking flags tracing without tracing 27.44 kB +0.15% +40 B 🔺
@sentry/browser (incl. Tracing) 51.22 kB +0.14% +68 B 🔺
@sentry/browser (incl. Tracing + Span Streaming) 51.23 kB +0.12% +61 B 🔺
@sentry/browser (incl. Tracing, Profiling) 54.22 kB +0.08% +41 B 🔺
@sentry/browser (incl. Tracing, Replay) 90.81 kB +0.06% +51 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 79.9 kB +0.05% +36 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas) 95.5 kB +0.04% +37 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback) 108.46 kB +0.05% +49 B 🔺
@sentry/browser (incl. Feedback) 46.8 kB +0.08% +36 B 🔺
@sentry/browser (incl. sendFeedback) 34.35 kB +0.14% +48 B 🔺
@sentry/browser (incl. FeedbackAsync) 39.45 kB +0.1% +36 B 🔺
@sentry/browser (incl. Metrics) 30.29 kB +0.13% +38 B 🔺
@sentry/browser (incl. Logs) 30.56 kB +0.15% +45 B 🔺
@sentry/browser (incl. Metrics & Logs) 31.22 kB +0.13% +40 B 🔺
@sentry/react 31.12 kB +0.12% +35 B 🔺
@sentry/react (incl. Tracing) 53.59 kB +0.11% +55 B 🔺
@sentry/vue 36.78 kB +0.13% +47 B 🔺
@sentry/vue (incl. Tracing) 53.75 kB +0.1% +51 B 🔺
@sentry/svelte 29.31 kB +0.16% +45 B 🔺
CDN Bundle 31.05 kB +0.11% +33 B 🔺
CDN Bundle (incl. Tracing) 51.82 kB +0.09% +44 B 🔺
CDN Bundle (incl. Logs, Metrics) 33.31 kB +0.07% +23 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) 53.81 kB +0.13% +67 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) 74.07 kB +0.1% +72 B 🔺
CDN Bundle (incl. Tracing, Replay) 89.43 kB +0.07% +61 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 91.37 kB +0.04% +35 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) 95.57 kB +0.04% +37 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 97.53 kB +0.04% +32 B 🔺
CDN Bundle - uncompressed 91.72 kB +0.07% +59 B 🔺
CDN Bundle (incl. Tracing) - uncompressed 154.12 kB +0.06% +88 B 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed 98.31 kB +0.08% +74 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 160.07 kB +0.06% +88 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 227.87 kB +0.03% +63 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed 273.87 kB +0.05% +112 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 279.81 kB +0.05% +112 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 287.57 kB +0.04% +112 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 293.5 kB +0.04% +112 B 🔺
@sentry/nextjs (client) 55.84 kB +0.11% +57 B 🔺
@sentry/sveltekit (client) 51.64 kB +0.08% +41 B 🔺
@sentry/core/server 40.03 kB +0.11% +41 B 🔺
@sentry/core/browser 13.66 kB +0.25% +33 B 🔺
@sentry/node 141.94 kB +0.05% +58 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 82.92 kB +0.05% +41 B 🔺
@sentry/node - without tracing 90.94 kB +0.07% +56 B 🔺
@sentry/node - without channel injection 120.33 kB +0.06% +66 B 🔺
@sentry/aws-serverless 99.2 kB +0.07% +62 B 🔺
@sentry/cloudflare (withSentry) - minified 206.69 kB +0.04% +78 B 🔺
@sentry/cloudflare (withSentry) 514.37 kB +0.07% +350 B 🔺

View base workflow run

Comment on lines +3 to +4
browserPerformanceTimeOrigin,
correctedPerformanceTimeOrigin,

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Do we need both? I don't think we would like to use a non-accurate time origin anywhere, or maybe I misunderstood?

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This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you apply the label PR: no-auto-close I will leave it alone ... forever!

…filing

`timestampInSeconds` re-derives its time origin when it detects clock drift,
but `browserPerformanceTimeOrigin` caches the origin resolved at SDK init and
never revisits it. Consumers that convert a `PerformanceEntry`'s monotonic
`startTime` to wall clock time therefore end up on a different timeline than
span and event timestamps once a correction has happened.

Exposes the corrected origin as `correctedPerformanceTimeOrigin` and uses it
for the consumers that outlive a span timeout: INP (reports on pagehide) and
replay (sessions run up to an hour). Profiling already compensated for the SDK
changing its time origin, but computed the adjustment against the stale cached
value.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@Lms24
Lms24 force-pushed the lms/fix-browser-live-performance-time-origin branch from 25c1b28 to fd7ccbb Compare September 28, 2026 13:10
@Lms24
Lms24 force-pushed the lms/fix-core-browser-timestampInSeconds-offset-clockdrift branch from 456dd81 to ded4f36 Compare September 28, 2026 13:10
@Lms24
Lms24 removed this pull request from stack #23069 September 28, 2026 14:25
@Lms24 Lms24 closed this Sep 28, 2026
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