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  4. what's the problem of scroll widget that it caused frame drop?
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what's the problem of scroll widget that it caused frame drop?

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  • A Offline
    A Offline
    arthurzhu
    wrote on last edited by
    #1

    The QML's ListView widget, when i slide screen slowly that the framerate will drop, otherwise quick slide and animation is fine of 60 fps.
    The browser app have the same problem, slow scrolling action will cause the frame drop.

    Thanks very much!

    hybris printLog() pid:10502 time:10:56:10 frame:11
    hybris printLog() pid:10502 framerate:25
    hybris printLog() pid:10502 time:10:56:11 frame:25
    hybris printLog() pid:10502 framerate:37
    hybris printLog() pid:10502 time:10:56:12 frame:37
    hybris printLog() pid:10502 framerate:44
    hybris printLog() pid:10502 time:10:56:13 frame:44
    hybris printLog() pid:10502 framerate:33
    hybris printLog() pid:10502 time:10:56:14 frame:33
    hybris printLog() pid:10502 framerate:34
    hybris printLog() pid:10502 time:10:56:15 frame:34
    hybris printLog() pid:10502 framerate:43
    hybris printLog() pid:10502 time:10:56:16 frame:43
    hybris printLog() pid:10502 framerate:35
    hybris printLog() pid:10502 time:10:56:17 frame:35
    hybris printLog() pid:10502 framerate:41
    hybris printLog() pid:10502 time:10:56:18 frame:41
    hybris printLog() pid:10502 framerate:41
    hybris printLog() pid:10502 time:10:56:19 frame:41
    hybris printLog() pid:10502 framerate:36
    hybris printLog() pid:10502 time:10:56:20 frame:36
    hybris printLog() pid:10502 framerate:62
    hybris printLog() pid:10502 time:10:56:21 frame:62
    hybris printLog() pid:10502 framerate:59
    hybris printLog() pid:10502 time:10:56:22 frame:59
    hybris printLog() pid:10502 framerate:59
    hybris printLog() pid:10502 time:10:56:23 frame:59

    J.HilkJ 1 Reply Last reply
    0
    • A arthurzhu

      The QML's ListView widget, when i slide screen slowly that the framerate will drop, otherwise quick slide and animation is fine of 60 fps.
      The browser app have the same problem, slow scrolling action will cause the frame drop.

      Thanks very much!

      hybris printLog() pid:10502 time:10:56:10 frame:11
      hybris printLog() pid:10502 framerate:25
      hybris printLog() pid:10502 time:10:56:11 frame:25
      hybris printLog() pid:10502 framerate:37
      hybris printLog() pid:10502 time:10:56:12 frame:37
      hybris printLog() pid:10502 framerate:44
      hybris printLog() pid:10502 time:10:56:13 frame:44
      hybris printLog() pid:10502 framerate:33
      hybris printLog() pid:10502 time:10:56:14 frame:33
      hybris printLog() pid:10502 framerate:34
      hybris printLog() pid:10502 time:10:56:15 frame:34
      hybris printLog() pid:10502 framerate:43
      hybris printLog() pid:10502 time:10:56:16 frame:43
      hybris printLog() pid:10502 framerate:35
      hybris printLog() pid:10502 time:10:56:17 frame:35
      hybris printLog() pid:10502 framerate:41
      hybris printLog() pid:10502 time:10:56:18 frame:41
      hybris printLog() pid:10502 framerate:41
      hybris printLog() pid:10502 time:10:56:19 frame:41
      hybris printLog() pid:10502 framerate:36
      hybris printLog() pid:10502 time:10:56:20 frame:36
      hybris printLog() pid:10502 framerate:62
      hybris printLog() pid:10502 time:10:56:21 frame:62
      hybris printLog() pid:10502 framerate:59
      hybris printLog() pid:10502 time:10:56:22 frame:59
      hybris printLog() pid:10502 framerate:59
      hybris printLog() pid:10502 time:10:56:23 frame:59

      J.HilkJ Offline
      J.HilkJ Offline
      J.Hilk
      Moderators
      wrote on last edited by
      #2

      @arthurzhu
      without really seeing what you coded, I can only point you to the documentation, regarding list views ans performances.

      Or to be more precise I point you to a post  @sierdzio
      https://forum.qt.io/topic/85380/listview-performance/2

      that contains every relevant link :D


      Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


      Q: What's that?
      A: It's blue light.
      Q: What does it do?
      A: It turns blue.

      1 Reply Last reply
      2
      • A Offline
        A Offline
        arthurzhu
        wrote on last edited by
        #3

        Thanks your replay!

        the issue is when I access the testufo.com by browser app, while touch and scroll the window then the framerate will drop to 40~50 fps.

        I just wanna the fps to be very stable of 60fps, a very simple QML's ListView widget shows the same problem too in our developing mobilephone.

        Are there some issues between touch event and rendering?

        1 Reply Last reply
        0

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