[Webkit-unassigned] [Bug 130056] New: Web Inspector: the inspector overlay lags out when element transforms change

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=130056

           Summary: Web Inspector: the inspector overlay lags out when
                    element transforms change
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://mrdoob.github.io/three.js/examples/css3d_period
                    ictable.html
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bburg at apple.com
                CC: timothy at apple.com, simon.fraser at apple.com,
                    joepeck at webkit.org,
                    webkit-bug-importer at group.apple.com,
                    graouts at webkit.org


Select a periodic element in the demo, so an overlay gets painted on it, fine.

Then, rotate the model. The page becomes quite busy, pegging a core. According to the profiler, it seems that we try to send a ton of overlay highlights during rotation, and it takes about 20 seconds to catch up. During that time, nothing gets highlighted.

We should do something smarter here. For starters, we could drop highlight messages on the floor if the queue gets past the point where the page overlay could keep up. I am not quite sure where these messages are being queued up at the moment, I would have to think about it harder.

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