Update on what happened in WebKit in the week from March 24 to March 31.
Cross-Port 🐱
Multimedia 🎥
GStreamer-based multimedia support for WebKit, including (but not limited to) playback, capture, WebAudio, WebCodecs, and WebRTC.
ManagedMediaSource was enabled in WPE WebKit and WebKitGTK.
JavaScriptCore 🐟
The built-in JavaScript/ECMAScript engine for WebKit, also known as JSC or SquirrelFish.
The JSC jitless Wasm tests now work again on ARMv7.
Doing a 32-bit build on ARM64 hardware now works with GCC 11.x as well.
Graphics 🖼️
Landed a change that improves the painting of tile fragments in the compositor if damage propagation is enabled and if the tiles sizes are bigger than 256x256. In those cases, less GPU is utilized when damage allows.
The GTK and WPE ports no longer use DisplayList to serialize the painting commands and replay them in worker threads, but SkPictureRecorder/SkPicture from Skia. Some parts of the WebCore painting system, especially font rendering, are not thread-safe yet, and our current cross-thread use of DisplayList makes it harder to improve the current architecture without breaking GTK and WPE ports. This motivated the search for an alternative implementation.
Community & Events 🤝
Sysprof is now able to filter samples by marks. This allows for statistically relevant data on what's running when a specific mark is ongoing, and as a consequence, allows for better data analysis. You can read more here.
That’s all for this week!
