benchmarking.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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"