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refs #338 Performance tests for regular expressions.

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This commit is contained in:
Mathew Sutcliffe
2014-10-13 15:50:30 +01:00
parent b12562ec5f
commit aca0202ba1
1 changed files with 32 additions and 0 deletions
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32
samples/blackmisc/samplesperformance.cpp
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@@ -111,6 +111,38 @@ namespace BlackMiscTest
ms = timer.elapsed();
qDebug() << "Copied 10k stations" << number << "times in" << ms << "ms";
// Regex pattern matching with lists of 10000 strings containing random hex numbers
auto generator = []() { return QString::number(qrand() | (qrand() << 16), 16); };
QStringList strList1, strList2, strList3, strList4;
std::generate_n(std::back_inserter(strList1), 100000, generator);
std::generate_n(std::back_inserter(strList2), 100000, generator);
std::generate_n(std::back_inserter(strList3), 100000, generator);
std::generate_n(std::back_inserter(strList4), 100000, generator);
QRegularExpression newRegex("^.*aaa.*$", QRegularExpression::CaseInsensitiveOption);
QRegExp fullRegex(".*aaa.*", Qt::CaseInsensitive);
QRegExp wildcardRegex("*aaa*", Qt::CaseInsensitive, QRegExp::Wildcard);
QString containsStr("aaa");
number = 0;
timer.start();
for (const auto &str : strList1) { if (newRegex.match(str).hasMatch()) number++; }
ms = timer.elapsed();
qDebug() << "new regex matched" << number << "of" << strList1.size() << "strings in" << ms << "ms";
number = 0;
timer.start();
for (const auto &str : strList2) { if (fullRegex.exactMatch(str)) number++; }
ms = timer.elapsed();
qDebug() << "full regex matched" << number << "of" << strList2.size() << "strings in" << ms << "ms";
number = 0;
timer.start();
for (const auto &str : strList3) { if (wildcardRegex.exactMatch(str)) number++; }
ms = timer.elapsed();
qDebug() << "wildcard matched" << number << "of" << strList3.size() << "strings in" << ms << "ms";
number = 0;
timer.start();
for (const auto &str : strList4) { if (str.contains(containsStr)) number++; }
ms = timer.elapsed();
qDebug() << "contains matched" << number << "of" << strList4.size() << "strings in" << ms << "ms";
qDebug() << "-----------------------------------------------";
return 0;
}