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  1. Qt
  2. QTBUG-109679

Qt Quick cannot keep up with high refresh rate monitors

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    • 08b71d861 (dev)

    Description

      On 240Hz monitor it doesn't seem to reach 200 FPS with animations. However, if animator is used instead, it has no problem reaching even several thousand FPS when vsync is off.

      In renderloop category all timings are 0, except with polishAndSync which is always called at some short interval:

      qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][gui thread] polishAndSync: start, elapsed since last call: 5 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][render thread 0x55cea6ba6790] syncAndRender: start, elapsed since last call: 5 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][gui thread] Frame prepared, polish=0 ms, lock=0 ms, blockedForSync=0 ms, animations=0 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][render thread 0x55cea6ba6790] syncAndRender: frame rendered in 0ms, sync=0, render=0, swap=0
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][gui thread] polishAndSync: start, elapsed since last call: 7 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][render thread 0x55cea6ba6790] syncAndRender: start, elapsed since last call: 7 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][gui thread] Frame prepared, polish=0 ms, lock=0 ms, blockedForSync=0 ms, animations=0 ms
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][render thread 0x55cea6ba6790] syncAndRender: frame rendered in 0ms, sync=0, render=0, swap=0
qt.scenegraph.time.renderloop: [window 0x55cea66ebc50][gui thread] polishAndSync: start, elapsed since last call: 5 ms

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            lagocs Laszlo Agocs
            poikelin Joni Poikelin
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              Updated:
              Resolved: