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  1. Qt
  2. QTBUG-50930

[Performance REG] Painting gradients much slower due to converting RGBA64->RGBA32

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Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • 5.6.1
    • 5.6.0 Beta
    • GUI: Painting
    • None
    • Linux/X11, CPU: i7 3770k OC 4.1GHz

    Description

      Painting gradients (software rasterizer) are much slower due to converting RGBA64->RGBA32. The performance issue is caused by converting color table using "toArgb32()" instead of using 32bit cached table. On FullHD painting can be more than 2x slower than Qt4.

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            allan.jensen Allan Sandfeld Jensen
            zaps166 Błażej Szczygieł
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              Created:
              Updated:
              Resolved:

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