Qt 4.8: benchmarking.cpp Example File (qtestlib/tutorial5/benchmarking.cpp)

Qt Reference Documentation

# benchmarking.cpp Example File

qtestlib/tutorial5/benchmarking.cpp

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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"