273924 2024-05-08 22:16:46 -0700 Explicitly clear event queues on a process swap 2024-06-05 15:40:18 -0700 1 1 1 Unclassified WebKit UI Events WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 charliew charliew webkit-bug-importer oldest_to_newest 2034207 0 charliew 2024-05-08 22:16:46 -0700 This is a speculative fix for recent reports that web pages are unresponsive to mouse events. In 269366@main, I removed code that explicitly cleared event queues on a process swap because, after 267849@main, we could rely on in-flight completion handlers to be called for terminated web processes. However, if the web process we are navigating away from does not terminate (i.e., if it is hosting another webpage), we rely on it to dequeue the events in the UI process. This change makes it so that we once again clear the event queues on a process swap. If the process we navigated away from has terminated or changed, we do not attempt to dequeue previous events because they have already been cleared. This way, if the source web process is unresponsive for any reason, it does not prevent events from being sent to the new page. 2034208 1 webkit-bug-importer 2024-05-08 22:18:19 -0700 <rdar://problem/127788996> 2034214 2 charliew 2024-05-08 22:21:48 -0700 Pull request: https://github.com/WebKit/WebKit/pull/28322 2034324 3 ews-feeder 2024-05-09 10:09:29 -0700 Committed 278568@main (fe4ddfdad76f): <https://commits.webkit.org/278568@main> Reviewed commits have been landed. Closing PR #28322 and removing active labels. 2034513 4 charliew 2024-05-10 04:22:33 -0700 rdar://127828852 2034517 5 charliew 2024-05-10 04:27:39 -0700 ^ ignore rdar://127788996 2039969 6 ews-feeder 2024-06-05 15:40:18 -0700 Committed 272448.1068@safari-7618-branch (5d22b5945943): <https://commits.webkit.org/272448.1068@safari-7618-branch> Reviewed commits have been landed. Closing PR #1318 and removing active labels.