Bug 231655

Summary:

Web Inspector: Reproducible hangs on twitter.com

Product:

WebKit

Reporter:

Jeff Johnson <opendarwin>

Component:

Web Inspector

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Major

CC:

inspector-bugzilla-changes, pangle, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 15

Hardware:

Mac (Intel)

OS:

macOS 11

Attachments:

Description	Flags
Sample of Safari Web Inspector process	none
Sample of Safari Technology Preview Web Inspector process	none

Jeff Johnson

Reported 2021-10-12 19:28:31 PDT

Created attachment 441033 [details] Sample of Safari Web Inspector process Steps to reproduce: 1) Open a private Safari window 2) Open https://twitter.com/jack 3) Open the web inspector 4) Select the Elements tab 5) Scroll down the Twitter page This bug occurs reproducibly with both Safari Version 15.0 (16612.1.29.41.4, 16612) and Safari Technology Preview Release 133 (Safari 15.4, WebKit 16613.1.2.2) on macOS Version 11.6 (20G165). Attached are samples of the hangs. I'm also seeing the web inspector process at >100% CPU in Activity Monitor.

Attachments
Sample of Safari Web Inspector process (684.66 KB, text/plain) 2021-10-12 19:28 PDT, Jeff Johnson	no flags	Details
Sample of Safari Technology Preview Web Inspector process (504.06 KB, text/plain) 2021-10-12 19:29 PDT, Jeff Johnson	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Jeff Johnson

Comment 1 2021-10-12 19:29:21 PDT

Created attachment 441034 [details] Sample of Safari Technology Preview Web Inspector process

Patrick Angle

Comment 2 2021-10-12 20:10:14 PDT

<rdar://79251712>

Patrick Angle

Comment 3 2021-10-12 20:18:59 PDT

Thank you for the report! This issue appears to no longer reproduce with a top of tree build, but does reproduce for me in STP 133. I believe this was fixed by r282607 (and possibly also improved by other related performance/hang fixes r282475, r282477, and r282610 related to DOM mutation), all of which are just past the range of fixes in Safari Technology Preview 133.

Jeff Johnson

Comment 4 2021-10-12 21:34:02 PDT

Thanks. I'll test with the next Safari Technology Preview.

Jeff Johnson

Comment 5 2022-02-13 07:02:12 PST

I just tested with Safari Technology Preview 140 (Safari 15.4, WebKit 16614.1.1.5), and this bug does indeed appear to be fixed. Thanks!

Note You need to log in before you can comment on or make changes to this bug.