summaryrefslogtreecommitdiffstats
path: root/tests/benchmarks/declarative/qmltime/qmltime.cpp
blob: f0a24f6c40cabbfd7050256f6daaf2c4041e056b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDeclarativeEngine>
#include <QDeclarativeComponent>
#include <QDebug>
#include <QApplication>
#include <QTime>
#include <QDeclarativeContext>
#include <QGraphicsScene>
#include <QGraphicsRectItem>

class Timer : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QDeclarativeComponent *component READ component WRITE setComponent)

public:
    Timer();

    QDeclarativeComponent *component() const;
    void setComponent(QDeclarativeComponent *);

    static Timer *timerInstance();

    void run(uint);

    bool willParent() const;
    void setWillParent(bool p);

private:
    void runTest(QDeclarativeContext *, uint);

    QDeclarativeComponent *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);
}

QDeclarativeComponent *Timer::component() const
{
    return m_component;
}

void Timer::setComponent(QDeclarativeComponent *c)
{
    m_component = c;
}

Timer *Timer::timerInstance()
{
    return m_timer;
}

void Timer::run(uint iterations)
{
    QDeclarativeContext 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(QDeclarativeContext *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 1.0\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())
#ifdef Q_OS_SYMBIAN
        filename = QLatin1String("./tests/item_creation/data.qml");
#else
        usage(argv[0]);
#endif

    QDeclarativeEngine engine;
    QDeclarativeComponent 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;
    }

#ifdef Q_OS_SYMBIAN
    willParent = true;
#endif
    timer->setWillParent(willParent);

    if (!timer->component()) {
        qWarning() << "The timer has no component";
        return -1;
    }

#ifdef Q_OS_SYMBIAN
    iterations = 1024;
#endif

    timer->run(iterations);

    return 0;
}

#include "qmltime.moc"