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Add a bench-mark for QDate's isValid() and daysInMonth()

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The two perform related calculations, so test them together.
RESULT : tst_QDate::monthLengths():
     0.33 msecs per iteration (total: 87, iterations: 256)

Change-Id: I86b36a9182b00c0a1f40e858ed3e7812434974c4
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Edward Welbourne 2019-05-22 15:00:58 +02:00
parent 5b672693e7
commit 7efce5d510
2 changed files with 57 additions and 0 deletions
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4
tests/benchmarks/corelib/tools/qdate/qdate.pro Normal file
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TARGET = tst_bench_qdate
QT = core testlib
SOURCES += tst_bench_qdate.cpp

53
tests/benchmarks/corelib/tools/qdate/tst_bench_qdate.cpp Normal file
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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module 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 <QDateTime>
#include <QTest>
class tst_QDate : public QObject
{
Q_OBJECT
private Q_SLOTS:
void monthLengths();
};
void tst_QDate::monthLengths()
{
QBENCHMARK {
for (int year = 1900; year <= 2100; year++) {
bool check = true;
for (int month = 1; month <= 12; month++)
check &= QDate::isValid(year, month, QDate(year, month, 1).daysInMonth());
Q_UNUSED(check);
}
}
}
QTEST_MAIN(tst_QDate)
#include "tst_bench_qdate.moc"