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 / workers / interfaces / DedicatedWorkerGlobalScope / postMessage
Spec: https://html.spec.whatwg.org/multipage/workers.html ↗
Runs: Chrome 155.0.8041.0 (wpt@4a01b83e3, 2026-09-04) | Firefox 157.0a1 (wpt@4a01b83e3, 2026-09-04) | Safari 251 preview (wpt@a1e944e7a, 2026-09-04) | Ladybird 1.0-a7825 (wpt@4a01b83e3, 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
| Area | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Total | 100.0%25/25 | 100.0%25/25 | 100.0%25/25 | 100.0%25/25 | 100.0%25/25 | 0.0%0/25 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| event-ports-dedicated.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| imagedata-cloned-canvas-in-array.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| message-event.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| return-value.worker.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| second-argument-dictionary.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| second-argument-null-in-array.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| second-argument-null.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| second-argument-undefined.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| setting-postMessage.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| structured-clone-imagedata.html | PASS | PASS | PASS | PASS | PASS | NOT RUN |
| structured-clone-message.html | 15/15 | 15/15 | 15/15 | 15/15 | 15/15 | NOT RUN |