Contact emails zheda.c...@intel.com, fdo...@chromium.org Specification https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html
Summary Align wake ups of JavaScript timers for unimportant cross-origin frames. Currently, DOM timers <32ms are all opt-out from AlignWakeUps [1] due to performance concerns. This is very conservative and actually some unimportant frames are eligible to use JS timer alignment. WebKit uses the policy to align DOM timer of non-interacted cross origin frames to 30ms. This feature adds JavaScript timer wake up alignment for unimportant frames on foreground pages. Unimportant frames means they are cross origin, visible but have small proportion of page’s visible area, and have no user interaction. [1] https://chromium-review.googlesource.com/c/chromium/src/+/4589092 Blink component Blink>PerformanceAPIs>Timers <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EPerformanceAPIs%3ETimers> TAG review None TAG review status Not applicable Risks Interoperability and Compatibility None *Gecko*: No signal *WebKit*: No signal *Web developers*: No signals *Other signals*: WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Goals for experimentation We plan to experiment on stable to confirm whether we observe same performance improvement as on lower channels and similar power benefit as in the lab. We will decide whether this feature ships based on the experiment data. Ongoing technical constraints None Debuggability None Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? Yes Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? No Flag name on chrome://flags None Finch feature name ThrottleUnimportantFrameTimers Requires code in //chrome? False Tracking bug https://issues.chromium.org/issues/40942028 Estimated milestones DevTrial on desktop 122 DevTrial on Android 122 Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5106220399853568 This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/38855cfe-3bf3-4a04-b96a-81adaa5ba72fn%40chromium.org.
