WebContent process main thread should have fixed priority on iOS 9. Priority decay regresses PLT and fixing the priority gives up a ~3% progression on warm PLT.
rdar://problem/22003112
Created attachment 257541 [details] Patch
Comment on attachment 257541 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=257541&action=review > Source/WebKit2/WebProcess/cocoa/WebProcessCocoa.mm:176 > + if (parameters.uiProcessBundleIdentifier == "com.apple.mobilesafari") Why only for MobileSafari? If this is a good idea for MobileSafari, why isn't it a good idea all he time?
(In reply to comment #3) > Comment on attachment 257541 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=257541&action=review > > > Source/WebKit2/WebProcess/cocoa/WebProcessCocoa.mm:176 > > + if (parameters.uiProcessBundleIdentifier == "com.apple.mobilesafari") > > Why only for MobileSafari? If this is a good idea for MobileSafari, why > isn't it a good idea all he time? Please see radar for more information.
Created attachment 257542 [details] Patch
(In reply to comment #3) > Comment on attachment 257541 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=257541&action=review > > > Source/WebKit2/WebProcess/cocoa/WebProcessCocoa.mm:176 > > + if (parameters.uiProcessBundleIdentifier == "com.apple.mobilesafari") > > Why only for MobileSafari? If this is a good idea for MobileSafari, why > isn't it a good idea all he time? I removed the check as discussed offline.
Comment on attachment 257542 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=257542&action=review Yuck. > Source/WebKit2/WebProcess/cocoa/WebProcessCocoa.mm:173 > +#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 90000) No need for the parentheses.
Created attachment 257544 [details] Patch
Comment on attachment 257544 [details] Patch Clearing flags on attachment: 257544 Committed r187412: <http://trac.webkit.org/changeset/187412>
All reviewed patches have been landed. Closing bug.