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  1. Qt
  2. QTBUG-36918

Add a QByteArrayRef class

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    • 631127126cc14e7c01cc611532b3256b58785670

      A class similar to QStringRef (QByteArrayRef?) would be very useful for processing binary messages containing binary or encoded text data.

      The attached microbenchmark project compares QString/QStringRef creation performance using QString::mid(), QString::fromRawData() and QString::midRef(). This benchmark more or less shows how much of a performance gain can be expected in similar tight message parsing loops.

      Output of an example run:

      Config: Using QTest library 4.8.4, Qt 4.8.4
PASS   : QStringRef_Test::initTestCase()
RESULT : QStringRef_Test::benchmarkQString():
     1.0 msecs per iteration (total: 70, iterations: 64)
PASS   : QStringRef_Test::benchmarkQString()
RESULT : QStringRef_Test::benchmarkFromRawData():
     0.77 msecs per iteration (total: 99, iterations: 128)
PASS   : QStringRef_Test::benchmarkFromRawData()
RESULT : QStringRef_Test::benchmarkQStringRef():
     0.68 msecs per iteration (total: 88, iterations: 128)
PASS   : QStringRef_Test::benchmarkQStringRef()
PASS   : QStringRef_Test::cleanupTestCase()
Totals: 5 passed, 0 failed, 0 skipped

        1. QStringRef_Test.zip
          1 kB
        2. qbytearrayref.tar.bz2
          1 kB
        For Gerrit Dashboard: QTBUG-36918
        # Subject Branch Project Status CR V
        79385,9 Introduce QByteArrayRef class. dev qt/qtbase Status: DEFERRED -1 0

            sonakur Sona Kurazyan
            ckakman Kayra Akman
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            4 Vote for this issue
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            13 Start watching this issue

              Created:
              Updated:
              Resolved:

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