In the iOS/WebKit1 world, we would synchronously GC upon receiving a memory warning. We should have the same behavior in iOS/WebKit2.
<rdar://problem/19738024>
Created attachment 246142 [details] Patch
Comment on attachment 246142 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=246142&action=review > Source/WebCore/platform/MemoryPressureHandler.cpp:139 > +#if PLATFORM(IOS) Since this is iOS-specific, it seems like this should be in MemoryPressureHandler::platformReleaseMemory(bool) in MemoryPressureHandlerCocoa.mm, right?
Created attachment 246143 [details] Patch Moved the logic per Chris's excellent suggestion.
Comment on attachment 246143 [details] Patch r=me
Comment on attachment 246143 [details] Patch Clearing flags on attachment: 246143 Committed r179737: <http://trac.webkit.org/changeset/179737>
All reviewed patches have been landed. Closing bug.
I'm worried about cost here in the edge case of pathological pressure. Let's do what you suggested in person -- GC now in response to background, GC soon in response to memory warning.