297533 2025-08-18 07:40:34 -0700 [Win] Faster memory pressure handler 2026-05-14 15:45:58 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build PC Windows 11 RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=146685 InRadar P2 Normal --- 1 ian.grunert webkit-unassigned webkit-bug-importer oldest_to_newest 2137150 0 ian.grunert 2025-08-18 07:40:34 -0700 When running the layout tests the system runs so low on memory that it can't run ruby: ScriptError raised: Failed to run "['ruby', '--version']" exit_code: 3221226505 (from worker/5) The current memory pressure handler runs once per minute. Ideally we'd use a wait function or similar so we can clear memory as soon as the LowMemoryResourceNotification triggers. 2137152 1 ian.grunert 2025-08-18 07:57:41 -0700 I think the current memory pressure handler might also run once and then uninstall the timer. 2137170 2 ian.grunert 2025-08-18 10:46:17 -0700 Also it looks like platformInitialize() is never called, so m_lowMemoryHandle is never initialized. 2138606 3 webkit-bug-importer 2025-08-25 07:41:13 -0700 <rdar://problem/159104225> 2140680 4 ian.grunert 2025-09-03 11:46:19 -0700 https://searchfox.org/firefox-main/source/xpcom/base/AvailableMemoryWatcherWin.cpp#222-242 I think we should be able to use RegisterWaitForSingleObject, and when we get the callback enqueue a one-shot timer to call the scavenger. This is lower priority now, as ENABLE_PERIODIC_MEMORY_MONITOR has been enabled for Windows. 2211032 5 ews-feeder 2026-05-14 15:45:56 -0700 Committed 313270@main (dc311bb8313d): <https://commits.webkit.org/313270@main> Reviewed commits have been landed. Closing PR #63320 and removing active labels.