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benchmarking.cpp Example File
qtestlib/tutorial5/benchmarking.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information (qt-info@nokia.com)
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** Licensees holding a valid Qt License Agreement may use this file in
 ** accordance with the rights, responsibilities and obligations
 ** contained therein.  Please consult your licensing agreement or
 ** contact qt-sales@nokia.com if any conditions of this licensing
 ** agreement are not clear to you.
 **
 ** Further information about Qt licensing is available at:
 ** http://trolltech.com/products/appdev/licensing.
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 ****************************************************************************/

 #include <QtGui>
 #include <qtest.h>

 class TestBenchmark : public QObject
 {
     Q_OBJECT
 private slots:
     void simple();
     void multiple_data();
     void multiple();
     void series_data();
     void series();
 };

 void TestBenchmark::simple()
 {
     QString str1 = QLatin1String("This is a test string");
     QString str2 = QLatin1String("This is a test string");

     QCOMPARE(str1.localeAwareCompare(str2), 0);

     QBENCHMARK {
         str1.localeAwareCompare(str2);
     }
 }

 void TestBenchmark::multiple_data()
 {
     QTest::addColumn<bool>("useLocaleCompare");
     QTest::newRow("locale aware compare") << true;
     QTest::newRow("standard compare") << false;
 }

 void TestBenchmark::multiple()
 {
     QFETCH(bool, useLocaleCompare);
     QString str1 = QLatin1String("This is a test string");
     QString str2 = QLatin1String("This is a test string");

     int result;
     if (useLocaleCompare) {
         QBENCHMARK {
             result = str1.localeAwareCompare(str2);
         }
     } else {
         QBENCHMARK {
             result = (str1 == str2);
         }
     }
 }

 void TestBenchmark::series_data()
 {
     QTest::addColumn<bool>("useLocaleCompare");
     QTest::addColumn<int>("stringSize");

     for (int i = 1; i < 10000; i += 2000) {
         QByteArray size = QByteArray::number(i);
         QTest::newRow(("locale aware compare--" + size).constData()) << true << i;
         QTest::newRow(("standard compare--" + size).constData()) << false << i;
     }
 }

 void TestBenchmark::series()
 {
     QFETCH(bool, useLocaleCompare);
     QFETCH(int, stringSize);

     QString str1 = QString().fill('A', stringSize);
     QString str2 = QString().fill('A', stringSize);
     int result;
     if (useLocaleCompare) {
         QBENCHMARK {
             result = str1.localeAwareCompare(str2);
         }
     } else {
         QBENCHMARK {
             result = (str1 == str2);
         }
     }
 }

 QTEST_MAIN(TestBenchmark)
 #include "benchmarking.moc"