[Webkit-unassigned] [Bug 145856] New: Web Inspector: Rendering Frames timeline should distinguish between layout and painting

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=145856

            Bug ID: 145856
           Summary: Web Inspector: Rendering Frames timeline should
                    distinguish between layout and painting
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mattbaker at apple.com
                CC: burg at cs.washington.edu, graouts at webkit.org,
                    joepeck at webkit.org, jonowells at apple.com,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    simon.fraser at apple.com, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

* SUMMARY
Rendering Frames timeline should distinguish between layout and painting.

In the Rendering Frames timeline, both layout and painting operations are listed in the “Layout” category. Layout and painting are two distinct operations in WebKit, and optimizations that reduce painting (e.g. compositing) often have no effect on layout, and vice versa.

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