[Webkit-unassigned] [Bug 214866] New: Profiler resolution is too low
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue Jul 28 01:53:11 PDT 2020
https://bugs.webkit.org/show_bug.cgi?id=214866
Bug ID: 214866
Summary: Profiler resolution is too low
Product: WebKit
Version: Safari 13
Hardware: Macintosh
OS: Unspecified
Status: NEW
Severity: Enhancement
Priority: P2
Component: Web Inspector
Assignee: webkit-unassigned at lists.webkit.org
Reporter: radexpl at gmail.com
CC: inspector-bugzilla-changes at group.apple.com
Hi. It appears that the Safari/webkit web inspector profiler samples stack traces approximately every 1ms. This is slow, and not suitable for many profiling tasks, since I'm only going to get a handful of samples when trying to hit 60fps, or react to an event in 50ms. By comparison, it appears that Chrome's Timeline profiler samples stacks every 100us.
Is there a technical reason why WebKit's profiler can't go up to 10kHz? If there's a tradeoff (slow processing, significantly degraded performance), can this be made configurable?
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