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  1. Qt
  2. QTBUG-113538

tst_bench_qguimetatype: Significant slowdown observed

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    • Icon: Task Task
    • Resolution: Unresolved
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    • Core: Object Model
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      Benchmark results were obtained by running the test on different versions of qtbase:

      • v5.15.10-lts-lgpl
      • v6.6.0-rc1

      Steps to reproduce the results

      v5.15.10-lts-lgpl
      git clone "ssh://codereview.qt-project.org/qt/qtbase"
cd qtbase
git checkout v5.15.10-lts-lgpl
mkdir build
cd build
../configure -release -commercial -confirm-license -make tests
make -j 4
LD_LIBRARY_PATH=$PWD/lib gui/kernel/qguimetatype/tst_bench_qguimetatype -minimumtotal 4000
      v6.6.0-rc1
      git clone "ssh://codereview.qt-project.org/qt/qtbase"
cd qtbase
git checkout v6.6.0-rc1
mkdir build
cd build
../configure -release -- -DQT_BUILD_BENCHMARKS=ON
cmake --build . --target tst_bench_qguimetatype
gui/kernel/qguimetatype/tst_bench_qguimetatype -minimumtotal 4000

        1.
        		 constructInPlace was 2.5 times slower Sub-task Reported Volker Hilsheimer
        2.
        		 constructInPlaceCopy was 3.3 times slower Sub-task Reported Volker Hilsheimer
        For Gerrit Dashboard: QTBUG-113538
        # Subject Branch Project Status CR V
        477451,5 PeakCAN: Improve doc for incompatible PCBUSB library versions dev qt/qtserialbus Status: MERGED +2 0
        483989,2 PeakCAN: Improve doc for incompatible PCBUSB library versions 6.5 qt/qtserialbus Status: MERGED +2 0
        483990,2 PeakCAN: Improve doc for incompatible PCBUSB library versions 6.6 qt/qtserialbus Status: MERGED +2 0

            thiago Thiago Macieira
            qtgerritbot Gerrit Bot
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              Created:
              Updated:

                There are no open Gerrit changes