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Diffstat (limited to 'tests/benchmarks/qml/qmltime/qmltime.cpp')
| -rw-r--r-- | tests/benchmarks/qml/qmltime/qmltime.cpp | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/tests/benchmarks/qml/qmltime/qmltime.cpp b/tests/benchmarks/qml/qmltime/qmltime.cpp new file mode 100644 index 0000000000..7bca7e6544 --- /dev/null +++ b/tests/benchmarks/qml/qmltime/qmltime.cpp @@ -0,0 +1,283 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include <QQmlEngine> +#include <QQmlComponent> +#include <QDebug> +#include <QApplication> +#include <QTime> +#include <QQmlContext> +#include <QGraphicsScene> +#include <QGraphicsRectItem> + +class Timer : public QObject +{ + Q_OBJECT + Q_PROPERTY(QQmlComponent *component READ component WRITE setComponent) + +public: + Timer(); + + QQmlComponent *component() const; + void setComponent(QQmlComponent *); + + static Timer *timerInstance(); + + void run(uint); + + bool willParent() const; + void setWillParent(bool p); + +private: + void runTest(QQmlContext *, uint); + + QQmlComponent *m_component; + static Timer *m_timer; + + bool m_willparent; + QGraphicsScene m_scene; + QGraphicsRectItem m_item; +}; +QML_DECLARE_TYPE(Timer); + +Timer *Timer::m_timer = 0; + +Timer::Timer() +: m_component(0), m_willparent(false) +{ + if (m_timer) + qWarning("Timer: Timer already registered"); + m_timer = this; + + m_scene.setItemIndexMethod(QGraphicsScene::NoIndex); + m_scene.addItem(&m_item); +} + +QQmlComponent *Timer::component() const +{ + return m_component; +} + +void Timer::setComponent(QQmlComponent *c) +{ + m_component = c; +} + +Timer *Timer::timerInstance() +{ + return m_timer; +} + +void Timer::run(uint iterations) +{ + QQmlContext context(qmlContext(this)); + + QObject *o = m_component->create(&context); + QGraphicsObject *go = qobject_cast<QGraphicsObject *>(o); + if (m_willparent && go) + go->setParentItem(&m_item); + delete o; + + runTest(&context, iterations); +} + +bool Timer::willParent() const +{ + return m_willparent; +} + +void Timer::setWillParent(bool p) +{ + m_willparent = p; +} + +void Timer::runTest(QQmlContext *context, uint iterations) +{ + QTime t; + t.start(); + for (uint ii = 0; ii < iterations; ++ii) { + QObject *o = m_component->create(context); + QGraphicsObject *go = qobject_cast<QGraphicsObject *>(o); + if (m_willparent && go) + go->setParentItem(&m_item); + delete o; + } + + int e = t.elapsed(); + + qWarning() << "Total:" << e << "ms, Per iteration:" << qreal(e) / qreal(iterations) << "ms"; + +} + +void usage(const char *name) +{ + qWarning("Usage: %s [-iterations <count>] [-parent] <qml file>\n", name); + + qWarning("qmltime is a tool for benchmarking the runtime cost of instantiating\n" + "a QML component. It is typically run as follows:\n" + "\n" + "%s path/to/benchmark.qml\n" + "\n" + "If the -parent option is specified, the component being measured will also\n" + "be parented to an item already in the scene.\n" + "\n" + "If the -iterations option is specified, the benchmark will run the specified\n" + "number of iterations. If -iterations is not specified, 1024 iterations\n" + "are performed.\n" + "\n" + "qmltime expects the file to be benchmarked to contain a certain structure.\n" + "Specifically, it requires the presence of a QmlTime.Timer element. For example,\n" + "say we wanted to benchmark the following list delegate:\n" + "\n" + "Rectangle {\n" + " color: \"green\"\n" + " width: 400; height: 100\n" + " Text {\n" + " anchors.centerIn: parent\n" + " text: name\n" + " }\n" + "}\n" + "\n" + "we would create a benchmark file that looks like this:\n" + "\n" + "import QtQuick 2.0\n" + "import QmlTime 1.0 as QmlTime\n" + "\n" + "Item {\n" + "\n" + " property string name: \"Bob Smith\"\n" + "\n" + " QmlTime.Timer {\n" + " component: Rectangle {\n" + " color: \"green\"\n" + " width: 400; height: 100\n" + " Text {\n" + " anchors.centerIn: parent\n" + " text: name\n" + " }\n" + " }\n" + " }\n" + "}\n" + "\n" + "The outer Item functions as a dummy data provider for any additional\n" + "data required by the bindings in the component being benchmarked (in the\n" + "example above we provide a \"name\" property).\n" + "\n" + "When started, the component is instantiated once before running\n" + "the benchmark, which means that the reported time does not include\n" + "compile time (as the results of compilation are cached internally).\n" + "In this sense the times reported by qmltime best correspond to the\n" + "costs associated with delegate creation in the view classes, where the\n" + "same delegate is instantiated over and over. Conversely, it is not a\n" + "good approximation for e.g. Loader, which typically only instantiates\n" + "an element once (and so for Loader the compile time is very relevant\n" + "to the overall cost).", name); + + exit(-1); +} + +int main(int argc, char ** argv) +{ + QApplication app(argc, argv); + + qmlRegisterType<Timer>("QmlTime", 1, 0, "Timer"); + + uint iterations = 1024; + QString filename; + bool willParent = false; + + for (int ii = 1; ii < argc; ++ii) { + QByteArray arg(argv[ii]); + + if (arg == "-iterations") { + if (ii + 1 < argc) { + ++ii; + QByteArray its(argv[ii]); + bool ok = false; + iterations = its.toUInt(&ok); + if (!ok) + usage(argv[0]); + } else { + usage(argv[0]); + } + } else if (arg == "-parent") { + willParent = true; + } else if (arg == "-help") { + usage(argv[0]); + } else { + filename = QLatin1String(argv[ii]); + } + } + + if (filename.isEmpty()) + usage(argv[0]); + + QQmlEngine engine; + QQmlComponent component(&engine, filename); + if (component.isError()) { + qWarning() << component.errors(); + return -1; + } + + QObject *obj = component.create(); + if (!obj) { + qWarning() << component.errors(); + return -1; + } + + Timer *timer = Timer::timerInstance(); + if (!timer) { + qWarning() << "A Tester.Timer instance is required."; + return -1; + } + + timer->setWillParent(willParent); + + if (!timer->component()) { + qWarning() << "The timer has no component"; + return -1; + } + + timer->run(iterations); + + return 0; +} + +#include "qmltime.moc" |