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Added string concatenation samples

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This commit is contained in:
Klaus Basan
2017-01-13 22:44:21 +01:00
committed by Mathew Sutcliffe
parent 265b6d33f0
commit 5420aee195
3 changed files with 93 additions and 5 deletions
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87
samples/blackmisc/samplesperformance.cpp
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@@ -36,6 +36,7 @@
#include <QRegularExpressionMatch>
#include <QString>
#include <QStringList>
#include <QStringBuilder>
#include <QTextStream>
#include <QTime>
#include <QVector>
@@ -402,7 +403,7 @@ namespace BlackSample
return 0;
}
int CSamplesPerformance::samplesString(QTextStream &out)
int CSamplesPerformance::samplesStringUtilsVsRegEx(QTextStream &out)
{
QTime timer;
static const QString chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789~_-=+!\"@#$%^&*()[]{} \t;:\\/?,.<>";
@@ -483,6 +484,89 @@ namespace BlackSample
return 0;
}
int CSamplesPerformance::samplesStringConcat(QTextStream &out)
{
const int loop = 250000;
QString x;
const QString x1 = "11-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x2 = "22-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x3 = "33-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x4 = "44-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x5 = "55-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x6 = "66-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x7 = "77-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x8 = "88-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const QString x9 = "99-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
QTime time;
time.start();
for (int i = 0; i < loop; i++)
{
x += "12-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
}
out << "+= String " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x += QLatin1String("12-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
out << "+= QLatin1String " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x += QStringLiteral("12-1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
}
out << "+= QStringLiteral " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x = x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9;
}
out << "+ String multiple " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x = x1 % x2 % x3 % x4 % x5 % x6 % x7 % x8 % x9;
}
out << "% String multiple " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x = x.append(x1).append(x2).append(x3).append(x4).append(x5).append(x6).append(x7).append(x8).append(x9);
}
out << "append String multiple " << time.elapsed() << "ms" << endl;
x.clear();
static const QString xArgString("%1 %2 %3 %4 %5 %6 %7 %8 %9");
time.start();
for (int i = 0; i < loop; i++)
{
x = xArgString.arg(x1, x2, x3, x4, x5, x6, x7, x8, x9);
}
out << "arg String multiple " << time.elapsed() << "ms" << endl;
x.clear();
time.start();
for (int i = 0; i < loop; i++)
{
x = QStringLiteral("%1 %2 %3 %4 %5 %6 %7 %8 %9").arg(x1, x2, x3, x4, x5, x6, x7, x8, x9);
}
out << "arg QStringLiteral multiple " << time.elapsed() << "ms" << endl;
x.clear();
return 0;
}
CAircraftSituationList CSamplesPerformance::createSituations(qint64 baseTimeEpoch, int numberOfCallsigns, int numberOfTimes)
{
CAircraftSituationList situations;
@@ -523,5 +607,4 @@ namespace BlackSample
}
return models;
}
} // namespace