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osu-lazer/osu.Game.Benchmarks/BenchmarkStringComparison.cs

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// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using BenchmarkDotNet.Attributes;
using osu.Game.Utils;
namespace osu.Game.Benchmarks
{
public class BenchmarkStringComparison
{
private string[] strings = null!;
[GlobalSetup]
public void GlobalSetUp()
{
strings = new string[10000];
for (int i = 0; i < strings.Length; ++i)
strings[i] = Guid.NewGuid().ToString();
for (int i = 0; i < strings.Length; ++i)
{
if (i % 2 == 0)
strings[i] = strings[i].ToUpperInvariant();
}
}
[Benchmark]
public void OrdinalIgnoreCase() => compare(StringComparer.OrdinalIgnoreCase);
[Benchmark]
public void OrdinalSortByCase() => compare(OrdinalSortByCaseStringComparer.DEFAULT);
[Benchmark]
public void InvariantCulture() => compare(StringComparer.InvariantCulture);
private void compare(IComparer<string> comparer)
{
for (int i = 0; i < strings.Length; ++i)
{
for (int j = i + 1; j < strings.Length; ++j)
_ = comparer.Compare(strings[i], strings[j]);
}
}
}
}