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  1. Qt
  2. QTBUG-42443

Angle (Qt::AA_UseOpenGLES) much slower than previous version

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.4.0 Beta
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      qt-enterprise-windows-x86-msvc2013_64-5.4.0-beta_2014-11-04_04-11-24-67.exe
    • Commits:
      a218a25

      Description

      Angle (Qt::AA_UseOpenGLES) on the new dynamic build is much slower than the previous implementation. To demonstrate this issue I modified the existing opengl cube example from the Qt package to draw 500 small balls and then measured the performance windows. The test app is attached.

      5.4.0 beta dynamic
      ==================

      • OpenGL Vendor: Google Inc.
      • OpenGL Version: OpenGL ES 2.0 (ANGLE 2.1.abce76206141)
      • OpenGL Renderer: ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0)
      • OpenGL Shading Language Version: OpenGL ES GLSL ES 1.00 (ANGLE 2.1.abce76206141)
        FPS = 11.811
        FPS = 12.1951
        FPS = 12.1495
        FPS = 12.1609
        FPS = 12.1382

      5.3.2 Angle
      ===========

      • OpenGL Vendor: Google Inc.
      • OpenGL Version: OpenGL ES 2.0 (ANGLE 1.3.5bb7ec572d0a)
      • OpenGL Renderer: ANGLE (Intel(R) HD Graphics 4600 Direct3D9Ex vs_3_0 ps_3_0)
      • OpenGL Shading Language Version: OpenGL ES GLSL ES 1.00 (ANGLE 1.3.5bb7ec572d0a)
        FPS = 45.3649
        FPS = 47.384
        FPS = 47.1976
        FPS = 47.2441

        Attachments

        1. cube_.7z
          33 kB
        2. cube.7z
          31 kB
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            Assignee:
            misalmel Mika Salmela
            Reporter:
            misalmel Mika Salmela
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              Dates

              Created:
              Updated:
              Resolved:

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