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  1. Qt
  2. QTBUG-48334

Printing 20x slower in 5.4.1 compared to 5.3.1

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • P2: Important
    • None
    • 5.4.1
    • GUI: Printing
    • None
    • Windows 10, MSVC 2013 64bit
    • d797a04adc5a76146ecff36e17b2a8658b0a5022

    Description

      • Run example program
      • Choose "Microsoft Print to PDF" or any other non-QT print driver
      • Wait for timing results

      4 seconds in QT 5.3.1
      95 seconds in QT 5.4.1+

      The slowness depends on the drawing calls. Drawing lines is 25% slower, while drawing arcs is 2000% slower.

      This bug is a show stopper for our software, which prints 25+ pages regularly. Printing time has increased from 45 seconds to 30 minutes in some cases.

      Attachments

        1. QT_print_speed_bug.zip
          68 kB
        2. main.cpp
          1 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-46604 [REG: 4.8->5.4]: When painting lines to a printer it can will take a lot of time to paint

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

            People

              johnlayt John Layt
              jeffmoyer Jeff Moyer
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              Dates

                Created:
                Updated:
                Resolved:

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