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WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.


wpt / performance-timeline

Spec: Performance Timeline ↗

Runs: Chrome 158.0.8110.0 (wpt@850b36a56, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@850b36a56, 2026-10-18) | Ladybird 1.0-0390f (wpt@4c84956f8, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz fb8d6c15e (wpt@cd1d8aa5b, 2026-10-17)

Score history

Percentage of subtests passing over time, one master run per day. Every engine's percentage is relative to the same denominator: the total number of subtests known to any engine in the latest runs (so lines are not distorted by tests being added to WPT, and an engine that skips tests is not flattered for it).

1 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%Nov 2025Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Jun 2026Jul 2026Aug 2026Sep 2026Oct 2026ChromeFirefoxSafariLadybirdServo

Sort: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total98.2%340/34688.1%305/34688.1%305/34671.6%248/34669.9%242/3460.0%0/346
not-restored-reasons84.6%11/130.0%0/130.0%0/137.6%1/130.0%0/130.0%0/13
TestChromeFirefoxSafariLadybirdServoBlitz
Total98.7%329/33391.5%305/33391.5%305/33374.1%247/33372.6%242/333NO DATA
back-forward-cache-restoration.tentative.htmlPASSTIMEOUTTIMEOUTTIMEOUTTIMEOUTNOT RUN
buffered-does-not-sync-invoke.htmlPASSPASSPASSPASSPASSNOT RUN
buffered-flag-after-timeout.any.htmlPASSPASSPASSPASSPASSNOT RUN
buffered-flag-after-timeout.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
buffered-flag-observer.any.htmlPASSPASSPASSPASSPASSNOT RUN
buffered-flag-observer.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
buffered-flag-with-entryTypes-observer.tentative.any.htmlPASSPASSPASSFAILFAILNOT RUN
buffered-flag-with-entryTypes-observer.tentative.any.worker.htmlPASSPASSPASSFAILFAILNOT RUN
case-sensitivity.any.html3/33/33/33/33/3NOT RUN
case-sensitivity.any.worker.html3/33/33/33/31/3NOT RUN
droppedentriescount.any.html5/50/50/50/50/5NOT RUN
droppedentriescount.any.worker.html5/50/50/50/50/5NOT RUN
get-invalid-entries.htmlPASSPASSPASSPASSPASSNOT RUN
idlharness.any.html57/5856/5856/5856/5856/58NOT RUN
idlharness.any.serviceworker.html57/5856/5856/580/580/58NOT RUN
idlharness.any.sharedworker.html57/5856/5856/5856/5856/58NOT RUN
idlharness.any.worker.html57/5856/5856/5856/5856/58NOT RUN
multiple-buffered-flag-observers.any.htmlPASSPASSPASSPASSPASSNOT RUN
multiple-buffered-flag-observers.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
navigation-id-detached-frame.tentative.htmlPASSPASSPASSPASSPASSNOT RUN
navigation-id-element-timing.tentative.htmlPASSTIMEOUTTIMEOUTTIMEOUTTIMEOUTNOT RUN
navigation-id-initial-load.tentative.htmlPASSFAILFAILTIMEOUTTIMEOUTNOT RUN
navigation-id-long-task-task-attribution.tentative.htmlPASSTIMEOUTTIMEOUTTIMEOUTTIMEOUTNOT RUN
navigation-id-mark-measure.tentative.htmlPASSFAILFAILFAILFAILNOT RUN
navigation-id-reset.tentative.htmlPASSFAILFAILFAILFAILNOT RUN
navigation-id-resource-timing.tentative.htmlPASSFAILFAILTIMEOUTFAILNOT RUN
navigation-id-worker-created-entries.htmlPASSFAILFAILFAILFAILNOT RUN
not-clonable.htmlPASSPASSPASSPASSPASSNOT RUN
observer-buffered-false.any.htmlPASSPASSPASSPASSPASSNOT RUN
observer-buffered-false.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
performanceentry-tojson.any.htmlPASSPASSPASSPASSPASSNOT RUN
performanceentry-tojson.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-callback-mutate.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-callback-mutate.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-disconnect-removes-observed-types.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-disconnect-removes-observed-types.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-disconnect.any.html3/33/33/33/33/3NOT RUN
po-disconnect.any.worker.html3/33/33/33/33/3NOT RUN
po-entries-sort.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-entries-sort.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-getentries.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-getentries.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-mark-measure.any.html3/33/33/33/33/3NOT RUN
po-mark-measure.any.worker.html3/33/33/33/33/3NOT RUN
po-observe-repeated-type.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-observe-repeated-type.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
po-observe-type.any.html6/66/66/66/64/6NOT RUN
po-observe-type.any.worker.html6/66/66/66/64/6NOT RUN
po-observe.any.html6/66/66/66/66/6NOT RUN
po-observe.any.worker.html6/66/66/66/66/6NOT RUN
po-observe.htmlPASSPASSPASSTIMEOUTTIMEOUTNOT RUN
po-resource.htmlPASSPASSPASSTIMEOUTPASSNOT RUN
po-takeRecords.any.htmlPASSPASSPASSPASSPASSNOT RUN
po-takeRecords.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
supportedEntryTypes-cross-realm-access.htmlPASSPASSPASSPASSPASSNOT RUN
supportedEntryTypes.any.html2/21/21/22/22/2NOT RUN
supportedEntryTypes.any.worker.html2/21/21/22/22/2NOT RUN
timing-removed-iframe.htmlPASSPASSPASSPASSPASSNOT RUN
webtiming-resolution.any.html2/22/22/22/22/2NOT RUN
webtiming-resolution.any.worker.html2/22/22/22/22/2NOT RUN
worker-with-performance-observer.htmlPASSPASSPASSPASSPASSNOT RUN