Uploaded image for project: 'Qt Creator'
  1. Qt Creator
  2. QTCREATORBUG-26829

QtcProcess is slower than QProcess

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • Not Evaluated
    • Qt Creator 6.0.2
    • Qt Creator 6.0.0
    • All Other Issues
    • None
    • macOS, Windows
    • bcee5c5dc4 (qt-creator/qt-creator/6.0) bcee5c5dc4 (qt-creator/qt-creator/master) bcee5c5dc4 (qt-creator/qt-creator/qmlprojectstorage) bcee5c5dc4 (qt-creator/qt-creator/qds-3.0)

    Description

      At https://bugreports.qt.io/browse/QTCREATORBUG-26754 we could see that by using QtcProcess insted of QProcess the ProcessCreator in Clangsupport was 3-4x slower on Windows, and 8x slower on macOS.

      This means that the slowness can happen on other processes started using QtcProcess but not easily noticeable as the C++ code completion.

       

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-26754 Code completion performance degradation with Qt Creator 6.0.0

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTCREATORBUG-26829
          # Subject Branch Project Status CR V
          388756,2 Revert "Revert "Use QtcProcess for clangbackend"" 6.0 qt-creator/qt-creator Status: MERGED +2 0
          388757,2 ClangCodeModel: Fix performance regression of code completion 6.0 qt-creator/qt-creator Status: MERGED -1 0

          Activity

            People

              con Eike Ziller
              cadam Cristian Adam
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes