[Webkit-unassigned] [Bug 21172] New: profiler has a significant impact on performance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=21172

           Summary: profiler has a significant impact on performance
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
               URL: http://nerget.com/rayjs3/rayjs.html
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: oliver at apple.com
                CC: timothy at hatcher.name, kmccullough at apple.com


If you run my 100% real world webpage with the profiler enabled you can see the
JS Profiler has a huge (~2x slower) performance impact.  This makes me sad.

To reproduce
1. Click the "render" link and wait for the render to complete
2. Click the "render with profiler" link and once again wait for the render to
complete
3. notice that the second time is ~2x larger than the first

Note: this should be done with a new window, and no other windows open.  The
inspector should not have been opened as that will trigger excessive GC cost
due to the DOM, which is a completely separate issue.


-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.