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Use StringComparison.Ordinal in hot paths (#18893)

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This commit is contained in:
Markus Johansson
2025-04-01 11:39:22 +02:00
committed by GitHub
parent e7a52de097
commit 1dd10eabd4
8 changed files with 156 additions and 10 deletions
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94
tests/Umbraco.Tests.Benchmarks/StringIndexOfBenchmarks.cs Normal file
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using BenchmarkDotNet.Attributes;
using Umbraco.Tests.Benchmarks.Config;
namespace Umbraco.Tests.Benchmarks;
[QuickRunWithMemoryDiagnoserConfig]
public class StringIndexOfBenchmarks
{
private string _domainName = "https://www.lorem-ipsum.com";
[Benchmark()]
public bool IndexOf_Original()
{
return _domainName.IndexOf("://") > 0;
}
[Benchmark()]
public bool IndexOf_Ordinal()
{
return _domainName.IndexOf("://", StringComparison.Ordinal) > -1;
}
[Benchmark()]
public bool IndexOf_Invariant()
{
return _domainName.IndexOf("://", StringComparison.InvariantCulture) > -1;
}
[Benchmark()]
public bool IndexOf_Span()
{
return _domainName.AsSpan().IndexOf("://", StringComparison.InvariantCulture) > -1;
}
[Benchmark()]
public bool Contains()
{
return _domainName.Contains("://");
}
[Benchmark()]
public bool Contains_Ordinal()
{
return _domainName.Contains("://", StringComparison.Ordinal);
}
[Benchmark()]
public bool Contains_Invariant()
{
return _domainName.Contains("://", StringComparison.InvariantCulture);
}
[Benchmark()]
public bool Contains_Span_Ordinal()
{
return _domainName.AsSpan().Contains("://", StringComparison.Ordinal);
}
[Benchmark()]
public bool Contains_Span_Invariant()
{
return _domainName.AsSpan().Contains("://", StringComparison.InvariantCulture);
}
[Benchmark()]
public bool Span_Index_Of()
{
var uri = "https://www.lorem-ipsum.com".AsSpan();
return uri.IndexOf("#") > -1;
}
[Benchmark()]
public bool Span_Index_Of_Ordinal()
{
var uri = "https://www.lorem-ipsum.com".AsSpan();
return uri.IndexOf("#".AsSpan(), StringComparison.Ordinal) > -1;
}
/*
| Method | Mean | Error | StdDev | Allocated |
|------------------------ |-----------:|-----------:|----------:|----------:|
| IndexOf_Original | 916.918 ns | 73.7556 ns | 4.0428 ns | - |
| IndexOf_Ordinal | 4.083 ns | 1.5083 ns | 0.0827 ns | - |
| IndexOf_Invariant | 12.941 ns | 3.7574 ns | 0.2060 ns | - |
| IndexOf_Span | 13.076 ns | 3.0666 ns | 0.1681 ns | - |
| Contains | 2.828 ns | 0.3648 ns | 0.0200 ns | - |
| Contains_Ordinal | 4.368 ns | 0.9882 ns | 0.0542 ns | - |
| Contains_Invariant | 12.986 ns | 2.3526 ns | 0.1290 ns | - |
| Contains_Span_Ordinal | 2.924 ns | 0.1593 ns | 0.0087 ns | - |
| Contains_Span_Invariant | 12.502 ns | 1.4153 ns | 0.0776 ns | - |
| Span_Index_Of | 1.741 ns | 0.9093 ns | 0.0498 ns | - |
| Span_Index_Of_Ordinal | 1.809 ns | 0.3703 ns | 0.0203 ns | - |
*/
}

52
tests/Umbraco.Tests.Benchmarks/StringStartsWithBenchmarks.cs Normal file
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using BenchmarkDotNet.Attributes;
using Umbraco.Tests.Benchmarks.Config;
namespace Umbraco.Tests.Benchmarks;
[QuickRunWithMemoryDiagnoserConfig]
public class StringStartsWithBenchmarks
{
private string _domainName = "domain1.com";
[Benchmark(Baseline = true)]
public bool Original()
{
return _domainName.StartsWith("/");
}
[Benchmark()]
public bool Ordinal()
{
return _domainName.StartsWith("/",StringComparison.Ordinal);
}
[Benchmark()]
public bool Invariant()
{
return _domainName.StartsWith("/", StringComparison.InvariantCulture);
}
[Benchmark()]
public bool FirstChar()
{
return _domainName.Length > 0 && _domainName[0] == '/';
}
[Benchmark()]
public bool Span()
{
return _domainName.AsSpan().StartsWith("/".AsSpan(),StringComparison.Ordinal);
}
/*
| Method | Mean | Error | StdDev | Allocated |
|---------- |------------:|-----------:|----------:|----------:|
| Original | 255.2239 ns | 10.9432 ns | 0.5998 ns | - |
| Ordinal | 0.1784 ns | 0.3070 ns | 0.0168 ns | - |
| Invariant | 4.1270 ns | 0.4990 ns | 0.0274 ns | - |
| FirstChar | 0.0127 ns | 0.0098 ns | 0.0005 ns | - |
| Span | 0.8000 ns | 0.4526 ns | 0.0248 ns | - |
*/
}