http://www.enginpolat.com/csharp-string-indexof-contains-regex-ismatch-compiled-performans-karsilastirma

928

C# String.IndexOf, String.Contains, Regex.IsMatch(), Regex.IsMatch() Compiled performans karşılaştırma

InvokeTests.cs

public void InvokeTests()
{
    TestAndPrint(() => { StringIndexOfTest("dolor"); }, nameof(StringIndexOfTest) + "-NoMatch");

    TestAndPrint(() => { StringIndexOfTest("engin"); }, nameof(StringIndexOfTest) + "-Match");

    TestAndPrint(() => { StringContainsTest("dolor"); }, nameof(StringContainsTest) + "-NoMatch");

    TestAndPrint(() => { StringContainsTest("engin"); }, nameof(StringContainsTest) + "-Match");

    TestAndPrint(() => { RegexIsMatchTest("dolor"); }, nameof(RegexIsMatchTest) + "-NoMatch");

    TestAndPrint(() => { RegexIsMatchTest("engin"); }, nameof(RegexIsMatchTest) + "-Match");

    TestAndPrint(() => { RegexIsMatchCompiledTest("dolor"); }, nameof(RegexIsMatchCompiledTest) + "-NoMatch");

    TestAndPrint(() => { RegexIsMatchCompiledTest("engin"); }, nameof(RegexIsMatchCompiledTest) + "-Match");
}

Program.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Test başlıyor!");

        var scenarios = new TestScenarios();
        scenarios.InvokeTests();

        Console.WriteLine("Test tamamlandı!");
    }
}

RegexIsMatch.cs

private void RegexIsMatchTest(string comparedTo)
{
    for(var iLoop = 0; iLoop < this.TestIterationCount; iLoop++)
    {
        Regex.IsMatch(TestString, comparedTo);
    }
}

RegexIsMatchCompiled.cs

private void RegexIsMatchCompiledTest(string comparedTo)
{
    for(var iLoop = 0; iLoop < this.TestIterationCount; iLoop++)
    {
        Regex.IsMatch(TestString, comparedTo, RegexOptions.Compiled);
    }
}

String.cs

[Pure]
public bool Contains( string value ) {
    return ( IndexOf(value, StringComparison.Ordinal) >=0 );
}

StringContains.cs

private void StringContainsTest(string comparedTo)
{
    for(var iLoop = 0; iLoop < this.TestIterationCount; iLoop++)
    {
        TestString.Contains(comparedTo);
    }
}

StringIndexOf.cs

private void StringIndexOfTest(string comparedTo)
{
    for(var iLoop = 0; iLoop < this.TestIterationCount; iLoop++)
    {
        TestString.IndexOf(comparedTo);
    }
}

TestAndPrint.cs

private void TestAndPrint(Action Test, string testName)
{
    var watch = new Stopwatch();

    GC.Collect(2, GCCollectionMode.Forced);
    GC.WaitForFullGCComplete();

    watch.Restart();

    Test();

    Console.WriteLine($"{testName} testi {watch.ElapsedMilliseconds / 10D} ms. sürdü");
}

TestIterationCount.cs

private int TestIterationCount = 10_000_000;

TestString.cs

private string TestString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur scelerisque libero eros, et efficitur mi laoreet ac";