264534 2023-11-09 16:24:48 -0800 REGRESSION(269859@main): Caused CPU spins in some WebView client applications 2023-11-27 11:40:09 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 260360 1 commit-queue commit-queue piskov simon.fraser webkit-bug-importer oldest_to_newest 1991348 0 commit-queue 2023-11-09 16:24:48 -0800 https://commits.webkit.org/269859@main introduced a regression: Caused CPU spins in some WebView client applications This is an automatic bug report generated by webkitbot. If this bug report was created because of a flaky test, please file a bug for the flaky test (if we don't already have one on file) and dup this bug against that bug so that we can track how often these flaky tests fail. 1991350 1 468546 commit-queue 2023-11-09 16:24:53 -0800 Created attachment 468546 REVERT of 269859@main Any committer can land this patch automatically by marking it commit-queue+. The commit-queue will build and test the patch before landing to ensure that the revert will be successful. This process takes approximately 15 minutes. If you would like to land the revert faster, you can use the following command: webkit-patch land-attachment ATTACHMENT_ID where ATTACHMENT_ID is the ID of this attachment. 1991354 2 ews-feeder 2023-11-09 16:30:56 -0800 Committed 270489@main (927b1ffbab10): <https://commits.webkit.org/270489@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 468546. 1991356 3 webkit-bug-importer 2023-11-09 16:32:14 -0800 <rdar://problem/118206272> 1994520 4 piskov 2023-11-23 04:37:19 -0800 Any chance the fix can be expedited into macOS? Sonoma beta is trashing battery in 1-2 hours because of this. To make matters worse: > AppleSeed News Thanksgiving Break > Please note that our team will not be processing feedback during our Thanksgiving Break, November 18th through November 26th. Please continue to submit your feedback. We will process new feedback and respond to any inquiries when we return to the office on November 27th. 1994991 5 simon.fraser 2023-11-27 10:16:49 -0800 What apps are you seeing this with in Sonoma beta? 1995016 6 piskov 2023-11-27 11:31:52 -0800 (In reply to Simon Fraser (smfr) from comment #5) > What apps are you seeing this with in Sonoma beta? 1. Mail app. Though it’s tricky to reproduce: guess, it’s related to some specific HTML emails. But after a while it most definitely settles with 100% cpu usage — I keep quit the app after reading emails because of this. 2. The best candidate to illustrate this regression is Outline VPN client: just starting the app (without any vpn connection, just opening it is enough) immediately sends it to 99.7% cpu usage. https://github.com/Jigsaw-Code/outline-client/issues/1786#issuecomment-1820868430 https://itunes.apple.com/us/app/outline-app/id1356178125 (Unfortunately, I don’t remember the dev discussion for some another app that traced the issue right to this specific regression — that’s how I ended on this page). 1995024 7 piskov 2023-11-27 11:40:09 -0800 Found it: another app is f.lux. Here’s the discussion that brought me here: https://forum.justgetflux.com/topic/8491/sonoma-14-2-beta-3-100-cpu/2 468546 2023-11-09 16:24:53 -0800 2023-11-09 16:30:59 -0800 REVERT of 269859@main bug-264534-20231110002453.patch text/plain 6845 commit-queue RnJvbSA3NzgyZDEwNWE4ZDJlY2M2M2IwY2RkOTllYTg0OWJhNTMxZmJiZjcyIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBDb21taXQgUXVldWUgPGNvbW1pdC1xdWV1ZUB3ZWJraXQub3Jn PgpEYXRlOiBGcmksIDEwIE5vdiAyMDIzIDAwOjI0OjUxICswMDAwClN1YmplY3Q6IFtQQVRDSF0g VW5yZXZpZXdlZCwgcmV2ZXJ0aW5nIDI2OTg1OUBtYWluLgogaHR0cHM6Ly9idWdzLndlYmtpdC5v cmcvc2hvd19idWcuY2dpP2lkPTI2NDUzNAoKQ2F1c2VkIENQVSBzcGlucyBpbiBzb21lIFdlYlZp ZXcgY2xpZW50IGFwcGxpY2F0aW9ucwoKUmV2ZXJ0ZWQgY2hhbmdlc2V0OgoKIlJFR1JFU1NJT04g KDI2MzkxN0BtYWluKTogWyBtYWNPUyBdIDMgaW5zcGVjdG9yL3RpbWVsaW5lL3RpbWVsaW5lLWV2 ZW50LVRpbWVyIHRlc3RzIGFyZSBhIGNvbnNpc3RlbnQgZmFpbHVyZSIKaHR0cHM6Ly9idWdzLndl YmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTI2MDM2MApodHRwczovL2NvbW1pdHMud2Via2l0Lm9y 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