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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 / compression

Spec: https://wicg.github.io/compression/ ↗

Runs: Chrome 158.0.8110.0 (wpt@5ffee20ed, 2026-10-17) | Firefox 160.0a1 (wpt@d8b153fad, 2026-10-16) | Safari 254 preview (wpt@51a43ba4a, 2026-10-17) | Ladybird 1.0-401b1 (wpt@470a7adf8, 2026-10-17) | 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
Total77.5%1020/131699.6%1312/131699.9%1315/131672.7%958/131667.3%886/13160.0%0/1316
TestChromeFirefoxSafariLadybirdServoBlitz
Total77.5%1020/131699.6%1312/131699.9%1315/131672.7%958/131667.3%886/1316NO DATA
compression-bad-chunks.any.html21/2828/2828/2820/2820/28NOT RUN
compression-bad-chunks.any.serviceworker.html21/2828/2828/280/280/28NOT RUN
compression-bad-chunks.any.sharedworker.html21/2828/2828/2820/2820/28NOT RUN
compression-bad-chunks.any.worker.html21/2828/2828/2820/2820/28NOT RUN
compression-constructor-error.any.html3/33/33/33/33/3NOT RUN
compression-constructor-error.any.serviceworker.html3/33/33/30/30/3NOT RUN
compression-constructor-error.any.sharedworker.html3/33/33/33/33/3NOT RUN
compression-constructor-error.any.worker.html3/33/33/33/33/3NOT RUN
compression-including-empty-chunk.any.html9/1212/1212/1212/129/12NOT RUN
compression-including-empty-chunk.any.serviceworker.html9/1212/1212/120/120/12NOT RUN
compression-including-empty-chunk.any.sharedworker.html9/1212/1212/1212/129/12NOT RUN
compression-including-empty-chunk.any.worker.html9/1212/1212/1212/129/12NOT RUN
compression-large-flush-output.any.html3/44/44/44/43/4NOT RUN
compression-large-flush-output.any.serviceworker.html3/44/44/40/40/4NOT RUN
compression-large-flush-output.any.sharedworker.html3/44/44/44/43/4NOT RUN
compression-large-flush-output.any.worker.html3/44/44/44/43/4NOT RUN
compression-multiple-chunks.any.html45/6060/6060/6060/6045/60NOT RUN
compression-multiple-chunks.any.serviceworker.html45/6060/6060/600/600/60NOT RUN
compression-multiple-chunks.any.sharedworker.html45/6060/6060/6060/6045/60NOT RUN
compression-multiple-chunks.any.worker.html45/6060/6060/6060/6045/60NOT RUN
compression-output-length.any.html3/44/44/44/44/4NOT RUN
compression-output-length.any.serviceworker.html3/44/44/40/40/4NOT RUN
compression-output-length.any.sharedworker.html3/44/44/44/44/4NOT RUN
compression-output-length.any.worker.html3/44/44/44/44/4NOT RUN
compression-stream.any.html10/1313/1313/1313/1311/13NOT RUN
compression-stream.any.serviceworker.html10/1313/1313/130/130/13NOT RUN
compression-stream.any.sharedworker.html10/1313/1313/1313/1311/13NOT RUN
compression-stream.any.worker.html10/1313/1313/1313/1311/13NOT RUN
compression-with-detach.any.htmlPASSPASSPASSPASSPASSNOT RUN
compression-with-detach.any.serviceworker.htmlPASSPASSPASSERRORERRORNOT RUN
compression-with-detach.any.sharedworker.htmlPASSPASSPASSPASSPASSNOT RUN
compression-with-detach.any.worker.htmlPASSPASSTIMEOUTPASSPASSNOT RUN
decompression-bad-chunks.any.html27/3636/3636/3636/3628/36NOT RUN
decompression-bad-chunks.any.serviceworker.html27/3636/3636/360/360/36NOT RUN
decompression-bad-chunks.any.sharedworker.html27/3636/3636/3636/3628/36NOT RUN
decompression-bad-chunks.any.worker.html27/3636/3636/3636/3628/36NOT RUN
decompression-brotli-large-window.tentative.any.htmlFAILFAILPASSFAILPASSNOT RUN
decompression-brotli-large-window.tentative.any.serviceworker.htmlFAILFAILPASSERRORERRORNOT RUN
decompression-brotli-large-window.tentative.any.sharedworker.htmlFAILFAILPASSFAILPASSNOT RUN
decompression-brotli-large-window.tentative.any.worker.htmlFAILFAILPASSFAILPASSNOT RUN
decompression-buffersource.any.html36/4848/4848/4848/4848/48NOT RUN
decompression-buffersource.any.serviceworker.html36/4848/4848/480/480/48NOT RUN
decompression-buffersource.any.sharedworker.html36/4848/4848/4848/4848/48NOT RUN
decompression-buffersource.any.worker.html36/4848/4848/4848/4848/48NOT RUN
decompression-constructor-error.any.html3/33/33/33/33/3NOT RUN
decompression-constructor-error.any.serviceworker.html3/33/33/30/30/3NOT RUN
decompression-constructor-error.any.sharedworker.html3/33/33/33/33/3NOT RUN
decompression-constructor-error.any.worker.html3/33/33/33/33/3NOT RUN
decompression-correct-input.any.html3/44/44/44/44/4NOT RUN
decompression-correct-input.any.serviceworker.html3/44/44/40/40/4NOT RUN
decompression-correct-input.any.sharedworker.html3/44/44/44/44/4NOT RUN
decompression-correct-input.any.worker.html3/44/44/44/44/4NOT RUN
decompression-corrupt-input.any.html26/2929/2929/2929/2929/29NOT RUN
decompression-corrupt-input.any.serviceworker.html26/2929/2929/290/290/29NOT RUN
decompression-corrupt-input.any.sharedworker.html26/2929/2929/2929/2929/29NOT RUN
decompression-corrupt-input.any.worker.html26/2929/2929/2929/2929/29NOT RUN
decompression-empty-input.any.html3/44/44/44/44/4NOT RUN
decompression-empty-input.any.serviceworker.html3/44/44/40/40/4NOT RUN
decompression-empty-input.any.sharedworker.html3/44/44/44/44/4NOT RUN
decompression-empty-input.any.worker.html3/44/44/44/44/4NOT RUN
decompression-extra-input.any.html3/44/44/40/44/4NOT RUN
decompression-extra-input.any.serviceworker.html3/44/44/40/40/4NOT RUN
decompression-extra-input.any.sharedworker.html3/44/44/40/44/4NOT RUN
decompression-extra-input.any.worker.html3/44/44/40/44/4NOT RUN
decompression-split-chunk.any.html45/6060/6060/6060/6060/60NOT RUN
decompression-split-chunk.any.serviceworker.html45/6060/6060/600/600/60NOT RUN
decompression-split-chunk.any.sharedworker.html45/6060/6060/6060/6060/60NOT RUN
decompression-split-chunk.any.worker.html45/6060/6060/6060/6060/60NOT RUN
decompression-uint8array-output.any.html3/44/44/44/44/4NOT RUN
decompression-uint8array-output.any.serviceworker.html3/44/44/40/40/4NOT RUN
decompression-uint8array-output.any.sharedworker.html3/44/44/44/44/4NOT RUN
decompression-uint8array-output.any.worker.html3/44/44/44/44/4NOT RUN
decompression-with-detach.any.htmlPASSPASSPASSPASSPASSNOT RUN
decompression-with-detach.any.serviceworker.htmlPASSPASSPASSERRORERRORNOT RUN
decompression-with-detach.any.sharedworker.htmlPASSPASSPASSPASSPASSNOT RUN
decompression-with-detach.any.worker.htmlPASSPASSPASSPASSPASSNOT RUN
idlharness.https.any.html20/2020/2020/2020/2020/20NOT RUN
idlharness.https.any.worker.html20/2020/2020/2020/2020/20NOT RUN