[Webkit-unassigned] [Bug 193605] New: Web Inspector: Frontend performance is very slow reloading theverge.com - 50% of time in TreeOutline _indexOfTreeElement
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Jan 18 19:08:40 PST 2019
https://bugs.webkit.org/show_bug.cgi?id=193605
Bug ID: 193605
Summary: Web Inspector: Frontend performance is very slow
reloading theverge.com - 50% of time in TreeOutline
_indexOfTreeElement
Product: WebKit
Version: WebKit Nightly Build
Hardware: All
OS: All
Status: NEW
Severity: Normal
Priority: P2
Component: Web Inspector
Assignee: webkit-unassigned at lists.webkit.org
Reporter: joepeck at webkit.org
CC: inspector-bugzilla-changes at group.apple.com,
mattbaker at apple.com
Created attachment 359577
--> https://bugs.webkit.org/attachment.cgi?id=359577&action=review
[IMAGE] JavaScript Profile
Frontend performance is very slow reloading theverge.com - 50% of time in TreeOutline _indexOfTreeElement
Steps to Reproduce:
1. Inspect <https://www.theverge.com>
2. Reload the page
=> Very slow inspector UI
Notes:
• Profiling Web Inspector shows massive time spent in TreeOutline code. See attached screeshot
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