Bug 247853 - Web Inspector: Timelines Tab: Poor performance makes it almost unusable when capturing screenshots
Summary: Web Inspector: Timelines Tab: Poor performance makes it almost unusable when ...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Web Inspector (show other bugs)
Version: Safari 16
Hardware: Mac (Apple Silicon) macOS 13
: P2 Major
Assignee: Nobody
URL: https://www.bieseckerart.com/gallery
Keywords: InRadar, Performance
Depends on:
Blocks:
 
Reported: 2022-11-13 00:04 PST by Tristan Biesecker
Modified: 2022-11-13 16:36 PST (History)
2 users (show)

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Description Tristan Biesecker 2022-11-13 00:04:16 PST 
When using the Timelines Tab to monitor website performance, the performance is so poor that it effectively makes the tool unusable.

Steps to reproduce:
1) Navigate to https://www.bieseckerart.com/gallery
2) Start an Events recording
3) Hover over some of the images and click on them to open the image modal
4) Close the modal and repeat

Expected Result:
The timeline view continues to remain responsive and can easily be stopped, started, etc.

Observed Result:
The web inspector, and the rest of the page, becomes extremely unresponsive very quickly.
Comment 1 Tristan Biesecker 2022-11-13 00:06:51 PST 
I just noticed that if I turn off capturing screenshots, performance is as expected.
Comment 2 Radar WebKit Bug Importer 2022-11-13 16:36:09 PST 
<rdar://problem/102297931>