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Diffstat (limited to 'tests/benchmarks/corelib/mimetypes/qmimedatabase/tst_bench_qmimedatabase.cpp')
-rw-r--r-- | tests/benchmarks/corelib/mimetypes/qmimedatabase/tst_bench_qmimedatabase.cpp | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/mimetypes/qmimedatabase/tst_bench_qmimedatabase.cpp b/tests/benchmarks/corelib/mimetypes/qmimedatabase/tst_bench_qmimedatabase.cpp new file mode 100644 index 0000000000..fb2a500982 --- /dev/null +++ b/tests/benchmarks/corelib/mimetypes/qmimedatabase/tst_bench_qmimedatabase.cpp @@ -0,0 +1,87 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:GPL-EXCEPT$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QTest> +#include <QMimeDatabase> + +class tst_QMimeDatabase: public QObject +{ + + Q_OBJECT + +private slots: + void inheritsPerformance(); + void benchMimeTypeForName(); +}; + +void tst_QMimeDatabase::inheritsPerformance() +{ + // Check performance of inherits(). + // This benchmark (which started in 2009 in kmimetypetest.cpp) uses 40 mimetypes. + QStringList mimeTypes; + mimeTypes << QLatin1String("image/jpeg") << QLatin1String("image/png") << QLatin1String("image/tiff") << QLatin1String("text/plain") << QLatin1String("text/html"); + mimeTypes += mimeTypes; + mimeTypes += mimeTypes; + mimeTypes += mimeTypes; + QCOMPARE(mimeTypes.count(), 40); + QMimeDatabase db; + QMimeType mime = db.mimeTypeForName(QString::fromLatin1("text/x-chdr")); + QVERIFY(mime.isValid()); + QBENCHMARK { + QString match; + foreach (const QString &mt, mimeTypes) { + if (mime.inherits(mt)) { + match = mt; + // of course there would normally be a "break" here, but we're testing worse-case + // performance here + } + } + QCOMPARE(match, QString::fromLatin1("text/plain")); + } + // Numbers from 2011, in release mode: + // KDE 4.7 numbers: 0.21 msec / 494,000 ticks / 568,345 instr. loads per iteration + // QMimeBinaryProvider (with Qt 5): 0.16 msec / NA / 416,049 instr. reads per iteration + // QMimeXmlProvider (with Qt 5): 0.062 msec / NA / 172,889 instr. reads per iteration + // (but the startup time is way higher) + // And memory usage is flat at 200K with QMimeBinaryProvider, while it peaks at 6 MB when + // parsing XML, and then keeps being around 4.5 MB for all the in-memory hashes. +} + +void tst_QMimeDatabase::benchMimeTypeForName() +{ + QMimeDatabase db; + + QBENCHMARK { + const auto s = db.mimeTypeForName(QStringLiteral("text/plain")); + QVERIFY(s.isValid()); + } +} + +QTEST_MAIN(tst_QMimeDatabase) + +#include "tst_bench_qmimedatabase.moc" |