[Webkit-unassigned] [Bug 180838] New: Web Inspector: Canvas tab: improve UI responsiveness when creating recording snapshots

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Dec 14 13:59:27 PST 2017


https://bugs.webkit.org/show_bug.cgi?id=180838

            Bug ID: 180838
           Summary: Web Inspector: Canvas tab: improve UI responsiveness
                    when creating recording snapshots
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mattbaker at apple.com
                CC: inspector-bugzilla-changes at group.apple.com

Created attachment 329400

  --> https://bugs.webkit.org/attachment.cgi?id=329400&action=review

[Recording] Large (~2MB) recording with ~5000 actions

Summary:
Improve UI responsiveness when creating recording snapshots. A significant amount of time is spent getting the canvas content whenever RecordingAction.apply is called, which can happen many times during the creation of a single snapshot.

Moving application of actions to a YieldableTask should help mitigate UI lockup, and allow the task to be cancelled/restarted if a new snapshot is requested before the current one completes rendering.

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