Qt 5.9 | Qt Test | Chapter 5: Writing a Benchmark | benchmarking.cpp Example File

Qt 5.9.9 Reference Documentation

# benchmarking.cpp Example File

tutorial5/benchmarking.cpp

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      #include <QtWidgets>
      #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);
              }
          }
          Q_UNUSED(result);
      }

      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);
              }
          }
          Q_UNUSED(result);
      }

      QTEST_MAIN(TestBenchmark)
      #include "benchmarking.moc"