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*Why | *Why execute a sync InputDispatcher task on main thread, instead of vsync-dispatcher thread, in step one? | ||
The APZ event processing code all currently runs on the main thread. APZ can't process the input at non-main thread until we complete the [https://bugzilla.mozilla.org/show_bug.cgi?id=930939 Bug 930939]. It will do the APZ off the main thread(it will update the APZ at VsyncDispatcher thread). | The APZ event processing code all currently runs on the main thread. APZ can't process the input at non-main thread until we complete the [https://bugzilla.mozilla.org/show_bug.cgi?id=930939 Bug 930939]. It will do the APZ off the main thread(it will update the APZ at VsyncDispatcher thread). | ||