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  1. Qt
  2. QTBUG-43774

REG[5.3->5.4]: Significant increase in application startup/stop/module loading time

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.4.2
    • 5.4.0
    • QPA: Windows, QPA: X11/XCB
    • None
    • Windows 7
    • Revert 5b1da97b6b4a011f9ce5582869a7a957f6f1369c (qtbase/5.4, 22.1.2015, 5.4.2), Delayed population standard font DB: c88e354993f8db3da741b1492f7578e9e0fdb07f (qtbase/5.4, 3.2.2015, 5.4.2)

    Description

      Here are some comparison values of loading/starting appication:
      Start and stop a small GUI-application. Any Qt example will do for comparison:
      runtime without main:5.3 - 40ms, 5.4 - 170ms
      loading modules, etc.: 5.3 - 80ms, 5.4 - 150ms
      setupUI: 5.3 - 10ms, 5.4 - 100ms

                             Win 5.3  Win 5.4.1   XCB 5.3  XCB 5.4
------------------------------+-----------+---------+-------
QApplication CT              8          8       232      209
ValidatorWidget CT          34        170        39       36
ValidatorWidget show        74         73       108      102

      Attachments

        1. qtbug43774_48_windows.txt
          1 kB
        2. qtbug43774_qt4_repro.diff
          2 kB
        3. qtbug43774_repro.diff
          2 kB
        4. qtbug43774_53_windows.txt
          1 kB
        5. qtbug43774_541_windows.txt
          1 kB
        6. qtbug43774_53_linux.txt
          1 kB
        7. qtbug43774_54_linux.txt
          1 kB
        8. qtbug43774.zip
          2 kB
        9. qtbug43447_diag.diff
          1 kB
        10. qtbug43774_diag2.diff
          2 kB
        11. qtbug43774_min.zip
          1 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-37165 Using a single Text element adds 2 seconds of startup time to a QML app

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40828 QFontDatabase don't show all available styles.

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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          Activity

            People

              kleint Friedemann Kleint
              qtcomsupport Qt Support
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              Dates

                Created:
                Updated:
                Resolved: