260478 2023-08-21 12:26:49 -0700 [WPE][GTK] Enable requestIdleCallback 2025-10-06 14:12:57 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux NEW https://bugs.webkit.org/show_bug.cgi?id=164193 P2 Normal --- 300022 1 mcatanzaro webkit-unassigned bugs-noreply rniwa ryan woodlxf00 zimmermann oldest_to_newest 1972453 0 mcatanzaro 2023-08-21 12:26:49 -0700 We need to enable requestIdleCallback, as in bug #260369. Ryosuke has left us this hint: """ You need to implement these functions: RunLoopObserver::schedule, RunLoopObserver::invalidate, and RunLoopObserver::isScheduled(): https://github.com/WebKit/WebKit/blob/main/Source/WebCore/platform/RunLoopObserver.cpp """ Unfortunately, looking at RunLoopObserverCF, I can't think of any way to map this to GMainContext, so it's probably not possible. We shouldn't try to modify GMainContext unless there are no other options. This requires further investigation. -------------------------------------------- We should also think about the problem I describe here: https://bugs.webkit.org/show_bug.cgi?id=164193#c18, i.e. we need to make sure web content cannot perform a denial of service that would prevent WebKit from running WebKit's own callbacks. 1972482 1 rniwa 2023-08-21 14:01:22 -0700 FWIW, the feature may work out of box right now because of the code I added to WindowEventLoop: https://github.com/WebKit/WebKit/blob/main/Source/WebCore/dom/WindowEventLoop.cpp#L189 Might be worth testing to see if you can enable the feature anyway without implementing RunLoopObserver. 2148839 2 zimmermann 2025-10-06 14:12:57 -0700 We got an implementation of RunLoopObserver now - currently under review @ https://github.com/WebKit/WebKit/pull/51678.