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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 / js / builtins / weakrefs

Spec: https://tc39.es/ecma262/ ↗

Runs: Chrome 155.0.8041.0 (wpt@4fbf9ef4d, 2026-09-04) | Firefox 157.0a1 (wpt@4fbf9ef4d, 2026-09-04) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@4fbf9ef4d, 2026-09-04) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)

Sort areas: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total8.3%3/365.6%2/368.3%3/362.8%1/362.8%1/360.0%0/36
TestChromeFirefoxSafariLadybirdServoBlitz
cleanup-prevented-with-reference.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
cleanup-prevented-with-reference.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
cleanup-prevented-with-unregister.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
cleanup-prevented-with-unregister.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
finalizationregistry-cleanupCallback-gets-a-microtask.optional.any.htmlPASSPASSPASSFAILFAILNOT RUN
finalizationregistry-cleanupCallback-gets-a-microtask.optional.any.worker.htmlPASSFAILPASSFAILFAILNOT RUN
finalizationregistry-cleanupCallback-throws-onerror-interaction.optional.window.htmlPASSPASSPASSPASSPASSNOT RUN
gc-has-one-chance-to-call-cleanupCallback-queueMicrotask.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
gc-has-one-chance-to-call-cleanupCallback-queueMicrotask.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
gc-has-one-chance-to-call-cleanupCallback-queueMicrotaskMutationObserver.optional.window.htmlFAILFAILFAILFAILFAILNOT RUN
gc-has-one-chance-to-call-cleanupCallback.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
gc-has-one-chance-to-call-cleanupCallback.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
holdings-multiple-values.optional.any.html0/90/90/90/90/9NOT RUN
holdings-multiple-values.optional.any.worker.html0/90/90/90/90/9NOT RUN
reentrancy.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
reentrancy.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
return-undefined-with-gc.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
return-undefined-with-gc.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN
unregister-cleaned-up-cell.optional.any.htmlFAILFAILFAILFAILFAILNOT RUN
unregister-cleaned-up-cell.optional.any.worker.htmlFAILFAILFAILFAILFAILNOT RUN