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  1. JDK
  2. JDK-8151756

JavaFX CSS is applied redundantly leading to significant performance degradation

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 8u72
    • Fix Version/s: 9
    • Component/s: javafx
    • Environment:

      JDK 1.8.0_72 64-bit
      Windows 7

    • Subcomponent:
    • CPU:
      generic
    • OS:
      generic

      Backports

        Description

        When a Node hierarchy is added to the Scene CSS is applied multiple times depending on the depth of the node in the added hierarchy. For every level of depth in the hierarchy the CSS is applied an extra time.

        See attached test case where a VBox containing another VBox containing a Rectangle is added to the Scene. Run the application in a debugger. When the UI appears set a breakpoint at Node.reapplyCss() then hit the button. Note that the breakpoint is hit three times for the Rectangle, twice for the 'parent2' VBox, and once for the 'parent1' VBox.

        This leads to significantly poorer performance and causes far more garbage to be generated than it should.

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                • Assignee:
                  jgiles Jonathan Giles
                  Reporter:
                  swpalmer Scott Palmer
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                  • Created:
                    Updated:
                    Resolved: