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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the qmlbench tool.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 <QCoreApplication>
#include <QCommandLineParser>
#include <QJsonDocument>
#include <QJsonObject>
#include <QFile>
#include <QSet>
#include <QVector>
#include <algorithm>
static QJsonObject loadFile(const QString &fileName, QString *error)
{
QFile f(fileName);
if (!f.open(QIODevice::ReadOnly)) {
*error = f.errorString();
return QJsonObject();
}
QJsonParseError jsonError;
auto document = QJsonDocument::fromJson(f.readAll(), &jsonError);
if (jsonError.error != QJsonParseError::NoError) {
*error = jsonError.errorString();
return QJsonObject();
}
if (!document.isObject()) {
*error = QLatin1String("JSON data is an array, expected an object");
return QJsonObject();
}
return document.object();
}
struct Result
{
QString name;
double differenceInPercent = 0;
};
static QString trimPrefix(const QString &str, const QString &prefix)
{
if (!str.startsWith(prefix))
return str;
QString result(str);
result.remove(0, prefix.length());
return result;
}
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
QCommandLineParser parser;
parser.setApplicationDescription("Compare results of json output of qmlbench");
parser.addHelpOption();
QCommandLineOption keyOption("key");
keyOption.setDescription(QCoreApplication::translate("main", "Result key in JSON data to compare"));
keyOption.setDefaultValue("average");
parser.addOption(keyOption);
QCommandLineOption prefixOption("prefix");
prefixOption.setDescription(QCoreApplication::translate("main", "Prefix to strip from test case names"));
prefixOption.setValueName(QString("path"));
parser.addOption(prefixOption);
parser.addPositionalArgument("baseline", QCoreApplication::translate("main", "Base line or reference performance results, in JSON format"));
parser.addPositionalArgument("results", QCoreApplication::translate("main", "New results to compare against the base line, in JSON format"));
parser.process(app);
const QString key = parser.value(keyOption);
const QString prefix = parser.value(prefixOption);
QStringList args = parser.positionalArguments();
if (args.count() != 2) {
qFatal("Internal error, two arguments are required, but QCommandLineParser should have checked for that...");
return EXIT_FAILURE;
}
const QString baseLineFileName = args.at(0);
const QString newResultsFileName = args.at(1);
QString error;
QJsonObject baseLine = loadFile(baseLineFileName, &error);
if (!error.isEmpty()) {
qWarning("Error loading reference file %s: %s", qPrintable(baseLineFileName), qPrintable(error));
return EXIT_FAILURE;
}
QJsonObject newResults = loadFile(newResultsFileName, &error);
if (!error.isEmpty()) {
qWarning("Error loading new results file %s: %s", qPrintable(baseLineFileName), qPrintable(error));
return EXIT_FAILURE;
}
const QSet<QString> unrelatedKeys{"command-line", "id", "opengl", "os", "qt", "windowSize"};
auto filter = [&unrelatedKeys](const QStringList &list) -> QStringList {
return list.toSet().subtract(unrelatedKeys).toList();
};
QStringList tests = filter(baseLine.keys());
QStringList newResultKeys = filter(newResults.keys());
if (tests != newResultKeys) {
QSet<QString> baseLineSet = tests.toSet();
QSet<QString> resultsSet = newResultKeys.toSet();
qWarning("Error: The two result files do not cover the same set of tests");
qWarning("Tests existing in the base line but missing from the new results: %s", qPrintable(baseLineSet.subtract(resultsSet).toList().join("\t\n")));
qWarning("Tests existing in the new results but missing from the base line: %s", qPrintable(resultsSet.subtract(baseLineSet).toList().join("\t\n")));
return EXIT_FAILURE;
}
QVector<Result> differencesInPercent;
for (const QString &test: qAsConst(tests)) {
const QJsonObject baseLineResult = baseLine[test].toObject();
const QJsonObject newResult = newResults[test].toObject();
const QString testName = trimPrefix(test, prefix);
const double oldValue = baseLineResult[key].toDouble();
const double newValue = newResult[key].toDouble();
const double differenceInPercent = (newValue - oldValue) * 100 / oldValue;
if (differenceInPercent > 0) {
printf("%s: improvement by %.2f%%\n", qPrintable(testName), differenceInPercent);
} else if (differenceInPercent < 0) {
printf("%s: regression by %.2f%%\n", qPrintable(testName), differenceInPercent);
}
differencesInPercent << Result{testName, differenceInPercent};
}
auto minMax = std::minmax_element(differencesInPercent.constBegin(), differencesInPercent.constEnd(), [](const auto &lhs, const auto &rhs) {
return lhs.differenceInPercent < rhs.differenceInPercent;
});
const Result biggestLoser = *minMax.first;
const Result biggestWinner = *minMax.second;
printf("Biggest improvement: %s with %.2f%%\n", qPrintable(biggestWinner.name), biggestWinner.differenceInPercent);
printf("Biggest regression: %s with %.2f%%\n", qPrintable(biggestLoser.name), biggestLoser.differenceInPercent);
double overallAverage = std::accumulate(differencesInPercent.constBegin(), differencesInPercent.constEnd(), 0.0, [](double v, const Result &r) {
return v + r.differenceInPercent; })
/ double(differencesInPercent.count());
printf("Overall average of differences: %.2f%%\n", overallAverage);
return EXIT_SUCCESS;
}
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