1 files changed, 111 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/kernel/qwineventnotifier/tst_bench_qwineventnotifier.cpp b/tests/benchmarks/corelib/kernel/qwineventnotifier/tst_bench_qwineventnotifier.cpp
new file mode 100644
index 0000000000..b1f87eabed
--- /dev/null
+++ b/tests/benchmarks/corelib/kernel/qwineventnotifier/tst_bench_qwineventnotifier.cpp
@@ -0,0 +1,111 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QTest>
+#include <QtCore/qglobal.h>
+#include <QtCore/qwineventnotifier.h>
+#include <QtCore/qeventloop.h>
+#include <QtCore/qvector.h>
+#include <QtCore/qelapsedtimer.h>
+#include <QtCore/qt_windows.h>
+
+class tst_QWinEventNotifier : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void waves_data();
+    void waves();
+};
+
+class EventsFactory : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit EventsFactory(int waves, int notifiers, int iterations)
+        : numberOfWaves(waves), numberOfNotifiers(notifiers),
+          numberOfIterations(iterations)
+    {
+        events.resize(notifiers);
+        for (int i = 0; i < notifiers; ++i) {
+            events[i] = CreateEvent(NULL, TRUE, FALSE, NULL);
+            QVERIFY(events[i] != NULL);
+            QWinEventNotifier *notifier = new QWinEventNotifier(events[i], this);
+            Q_CHECK_PTR(notifier);
+
+            connect(notifier, &QWinEventNotifier::activated, [i, this]() {
+                ResetEvent(this->events[i]);
+                if (--this->numberOfIterations == 0)
+                    this->eventLoop.quit();
+                else
+                    SetEvent(this->events[(i + 1) % this->numberOfNotifiers]);
+            });
+
+            connect(this, &EventsFactory::stop, [notifier]() {
+                notifier->setEnabled(false);
+            });
+        }
+    }
+    virtual ~EventsFactory()
+    {
+        for (auto event : events)
+            CloseHandle(event);
+    }
+
+    void run()
+    {
+        Q_ASSERT(numberOfWaves != 0);
+
+        int offset = 0;
+        for (int i = 0; i < numberOfWaves; ++i) {
+            SetEvent(events[offset]);
+            offset += qMax(1, numberOfNotifiers / numberOfWaves);
+            offset %= numberOfNotifiers;
+        }
+        eventLoop.exec();
+    }
+
+signals:
+    void stop();
+
+protected:
+    QVector<HANDLE> events;
+    QEventLoop eventLoop;
+    int numberOfWaves;
+    int numberOfNotifiers;
+    int numberOfIterations;
+};
+
+void tst_QWinEventNotifier::waves_data()
+{
+    QTest::addColumn<int>("waves");
+    QTest::addColumn<int>("notifiers");
+    for (int waves : {1, 3, 10}) {
+        for (int notifiers : {10, 100, 1000})
+            QTest::addRow("waves: %d, notifiers: %d", waves, notifiers) << waves << notifiers;
+    }
+}
+
+void tst_QWinEventNotifier::waves()
+{
+    QFETCH(int, waves);
+    QFETCH(int, notifiers);
+
+    const int iterations = 100000;
+
+    EventsFactory factory(waves, notifiers, iterations);
+
+    QElapsedTimer timer;
+    timer.start();
+
+    factory.run();
+
+    qDebug("Elapsed time: %.1f s", timer.elapsed() / 1000.0);
+
+    emit factory.stop();
+}
+
+QTEST_MAIN(tst_QWinEventNotifier)
+
+#include "tst_bench_qwineventnotifier.moc"