Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-28289

QDir::entryList and QDirIterator are very slow in a directory with many files compared to other non Qt methods

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • 5.6
    • 4.3.5, 4.4.3, 4.5.2, 4.6.1, 4.6.2, 4.6.3, 4.7.0, 4.7.1, 4.7.3, 4.7.4, 4.8.0, 5.1.1
    • Core: I/O
    • Windows

    Description

      When trying to get the content of a directory with more then 10000 files there is a very noticeable performance issue, it appears that the complexity is O(N^2).
      This is true for both QDir, and QDirIterator.
      Using the windows API is faster in several orders of magnitude.

      Attachments

        Activity

          People

            Eddy Edward Welbourne
            fargoth fargoth
            Votes:
            6 Vote for this issue
            Watchers:
            8 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: