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// Copyright (C) 2011 Robin Burchell <robin+qt@viroteck.net>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtCore>
#include <qtest.h>
#include <qcoreapplication.h>
class tst_QCoreApplication : public QObject
{
Q_OBJECT
private slots:
void event_posting_benchmark_data();
void event_posting_benchmark();
void event_posting_multiple_objects_benchmark_data();
void event_posting_multiple_objects_benchmark();
};
void tst_QCoreApplication::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 tst_QCoreApplication::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();
}
}
void tst_QCoreApplication::event_posting_multiple_objects_benchmark_data()
{
event_posting_benchmark_data();
}
void tst_QCoreApplication::event_posting_multiple_objects_benchmark()
{
QFETCH(int, size);
QObject objects[15]; // The size of the array has not been chosen through any meaningful means
QRandomGenerator gen;
// benchmark posting & sending events
QBENCHMARK {
for (int i = 0; i < size; ++i) {
QCoreApplication::postEvent(&objects[gen.bounded(0, int(std::size(objects)))],
new QTimerEvent(i % 10));
}
QCoreApplication::sendPostedEvents();
}
}
QTEST_MAIN(tst_QCoreApplication)
#include "tst_bench_qcoreapplication.moc"
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