[Webkit-unassigned] [Bug 142466] New: Web Inspector: DOM tree updates lag out when many inline styles change quickly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142466

            Bug ID: 142466
           Summary: Web Inspector: DOM tree updates lag out when many
                    inline styles change quickly
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: burg at cs.washington.edu
                CC: graouts at webkit.org, joepeck at webkit.org,
                    jonowells at apple.com, mattbaker at apple.com,
                    nvasilyev at apple.com, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

Steps to reproduce:

1. Capture timeline data in 1st level inspector
2. Open 2nd level inspector
3. Show DOM tree in 2nd level inspector
4. Zoom or otherwise change timeline record positions in 1st level inspector

It will take several seconds for the frontend to catch up.

I am not sure what the bottleneck is. We may need a more robust backoff/coalescing approach to fetching attributes. It appears that DOMTreeManager simply coalesces with a 0-delay timer before fetching.

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