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Fixed in 2017.1.X



Found in


Issue ID




CanvasRenderer.OnTransformChanged is called on disabled UI objects



When a transform with children CanvasRenderers is changed/moved CanvasRenderer.OnTransformChanged is called for all of them even if they are disabled causing huge CPU spikes.

The project attached contains a scene with 1000x4 such objects. Profiler shows a lot of time wasted in CanvasRenderer.OnTransformChanged every frame.

Comments (7)

  1. cozyurt_unity

    Jul 15, 2020 11:50

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  2. k_belonogov

    Mar 23, 2017 16:59

    Thanks, Unity! It works in 5.5.2p4

  3. k_belonogov

    Mar 23, 2017 14:02

    Unity 5.6.0f1 - nothing has changed :(((
    CanvasRenderer.OnTransformChanged - 4000 calls

  4. Froghuto

    Jan 10, 2017 15:06

    This makes using the UI system in VR projects (ui's that move with the camera) impossible. Please fix this!

  5. Lszt

    Jan 06, 2017 11:04

    Issue exists on Unity 5.3 too and probably before this. Please it could be nice to do something or at least review this.

  6. k_belonogov

    Dec 16, 2016 06:17

    There is not so good but working workaround. You can place inactive children from moving node to static one.

  7. zbyhoo

    Nov 08, 2016 17:29

    Is there ANY workaround for that? I have really big performance problems because of that on iPad 3.

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