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  1. Qt
  2. QTBUG-124376

Slow UI build in Release mode with MSVC

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Details

    • Bug
    • Resolution: Fixed
    • P1: Critical
    • 6.7.1, 6.7.2, 6.8.0 FF
    • 6.7.0
    • Core: QString and Unicode
    • None
    • Windows 10 64bit
      Windows SDK 10.0.20348.0
      MSVC 2022
      Qt Creator 13.0.0
    • Windows
    • d849cb80a (dev), 7faabcce1 (6.7), b0a7ace47 (6.7.1)
    • Foundation Sprint 106

    Description

      After switching to Qt 6.7.0 from Qt 6.6.3 building ui in Release mode is noticeable slow.
      Build times for attached test app:
      Qt 6.7.0 Elapsed time: 00:55
      Qt 6.6.3 Elapsed time: 00:05

      This appears if you add some layouts. Without layouts it seems ok.

      Attachments

        1. qt67testapp.zip
          3 kB
        2. qtbug124376.zip
          3 kB
        3. qtbug124376_core.zip
          2 kB

        Issue Links

          relates to

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. QTBUG-97601 Compilation speed decrease with Qt 6.2 compared to Qt 5.15.2

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

            People

              ivan.solovev Ivan Solovev
              qznec Ghenady
              Vladimir Minenko Vladimir Minenko
              Alex Blasche Alex Blasche
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              Dates

                Created:
                Updated:
                Resolved:

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