qt-everywhere-src-5.14.1/qtbase/tests/benchmarks/corelib/kernel/qcoreapplication/main.cpp

/****************************************************************************
**
** Copyright (C) 2011 Robin Burchell <robin+qt@viroteck.net>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QtCore>
#include <qtest.h>
#include <qcoreapplication.h>

class QCoreApplicationBenchmark : public QObject
{
Q_OBJECT
private slots:
    void event_posting_benchmark_data();
    void event_posting_benchmark();
};

void QCoreApplicationBenchmark::event_posting_benchmark_data()
{
    QTest::addColumn<int>("size");
    QTest::newRow("50 events") << 50;
    QTest::newRow("100 events") << 100;
    QTest::newRow("200 events") << 200;
    QTest::newRow("1000 events") << 1000;
    QTest::newRow("10000 events") << 10000;
    QTest::newRow("100000 events") << 100000;
    QTest::newRow("1000000 events") << 1000000;
}

void QCoreApplicationBenchmark::event_posting_benchmark()
{
    QFETCH(int, size);

    int type = QEvent::registerEventType();
    QCoreApplication *app = QCoreApplication::instance();

    // benchmark posting & sending events
    QBENCHMARK {
        for (int i = 0; i < size; ++i)
            QCoreApplication::postEvent(app, new QEvent(QEvent::Type(type)));
        QCoreApplication::sendPostedEvents();
    }
}

QTEST_MAIN(QCoreApplicationBenchmark)

#include "main.moc"