f776595cc1
From Qt 5.7 -> tools & applications are lisenced under GPL v3 with some exceptions, see http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/ Updated license headers to use new GPL-EXCEPT header instead of LGPL21 one (in those files which will be under GPL 3 with exceptions) Change-Id: I42a473ddc97101492a60b9287d90979d9eb35ae1 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com> Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtTest/QtTest>
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#include <qcoreapplication.h>
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#include <qobject.h>
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class tst_QObjectPerformance : public QObject
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{
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Q_OBJECT
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public:
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private slots:
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void emitToManyReceivers();
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};
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class SimpleSenderObject : public QObject
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{
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Q_OBJECT
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signals:
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void signal();
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public:
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void emitSignal()
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{
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emit signal();
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}
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};
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class SimpleReceiverObject : public QObject
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{
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Q_OBJECT
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public slots:
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void slot()
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{
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}
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};
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void tst_QObjectPerformance::emitToManyReceivers()
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{
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// ensure that emission times remain mostly linear as the number of receivers increase
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SimpleSenderObject sender;
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int elapsed = 0;
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const int increase = 3000;
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const int base = 5000;
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for (int i = 0; i < 4; ++i) {
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const int size = base + i * increase;
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const double increaseRatio = double(size) / (double)(size - increase);
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QList<SimpleReceiverObject *> receivers;
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for (int k = 0; k < size; ++k) {
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SimpleReceiverObject *receiver = new SimpleReceiverObject;
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QObject::connect(&sender, SIGNAL(signal()), receiver, SLOT(slot()));
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receivers.append(receiver);
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}
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QTime timer;
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timer.start();
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sender.emitSignal();
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int e = timer.elapsed();
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if (elapsed > 1) {
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qDebug() << size << "receivers, elapsed time" << e << "compared to previous time" << elapsed;
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QVERIFY(double(e) / double(elapsed) <= increaseRatio * 2.0);
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} else {
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qDebug() << size << "receivers, elapsed time" << e << "cannot be compared to previous, unmeasurable time";
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}
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elapsed = e;
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qDeleteAll(receivers);
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receivers.clear();
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}
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}
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QTEST_MAIN(tst_QObjectPerformance)
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#include "tst_qobjectperformance.moc"
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