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.NET 8 simple string concatenation benchmarks
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using BenchmarkDotNet.Attributes; | |
using BenchmarkDotNet.Columns; | |
using BenchmarkDotNet.Configs; | |
using BenchmarkDotNet.Jobs; | |
using BenchmarkDotNet.Reports; | |
using System; | |
using System.Text; | |
namespace Benchmarks | |
{ | |
[MemoryDiagnoser] | |
[Config(typeof(Config))] | |
[SimpleJob(RuntimeMoniker.Net80)] | |
[HideColumns(Column.Job, Column.RatioSD, Column.AllocRatio)] | |
public class StringConcatSimple | |
{ | |
private class Config : ManualConfig | |
{ | |
public Config() | |
{ | |
SummaryStyle = | |
SummaryStyle.Default.WithRatioStyle(RatioStyle.Percentage); | |
} | |
} | |
private string | |
title = "Mr.", firstName = "David", middleName = "Patrick", lastName = "Callan"; | |
[Benchmark] | |
public string StringBuilder() | |
{ | |
var stringBuilder = | |
new StringBuilder(); | |
return stringBuilder | |
.Append(title).Append(' ') | |
.Append(firstName).Append(' ') | |
.Append(middleName).Append(' ') | |
.Append(lastName).ToString(); | |
} | |
[Benchmark] | |
public string StringBuilderExact24() | |
{ | |
var stringBuilder = | |
new StringBuilder(24); | |
return stringBuilder | |
.Append(title).Append(' ') | |
.Append(firstName).Append(' ') | |
.Append(middleName).Append(' ') | |
.Append(lastName).ToString(); | |
} | |
[Benchmark] | |
public string StringBuilderEstimate100() | |
{ | |
var stringBuilder = | |
new StringBuilder(100); | |
return stringBuilder | |
.Append(title).Append(' ') | |
.Append(firstName).Append(' ') | |
.Append(middleName).Append(' ') | |
.Append(lastName).ToString(); | |
} | |
[Benchmark] | |
public string StringPlus() | |
{ | |
return title + ' ' + firstName + ' ' + | |
middleName + ' ' + lastName; | |
} | |
[Benchmark] | |
public string StringFormat() | |
{ | |
return string.Format("{0} {1} {2} {3}", | |
title, firstName, middleName, lastName); | |
} | |
[Benchmark] | |
public string StringInterpolation() | |
{ | |
return | |
$"{title} {firstName} {middleName} {lastName}"; | |
} | |
[Benchmark] | |
public string StringJoin() | |
{ | |
return string.Join(" ", title, firstName, | |
middleName, lastName); | |
} | |
[Benchmark] | |
public string StringConcat() | |
{ | |
return string. | |
Concat(new string[] { title, " ", firstName, " ", middleName, " ", lastName }); | |
} | |
[Benchmark(Baseline = true)] | |
public string StringCreate() | |
{ | |
return String.Create(title.Length + firstName.Length + middleName.Length + lastName.Length + 3, | |
(title, firstName, middleName, lastName), | |
(span, state) => | |
{ | |
state.title.AsSpan().CopyTo(span); | |
span = span.Slice(state.title.Length); | |
span[0] = ' '; | |
span = span.Slice(1); | |
state.firstName.AsSpan().CopyTo(span); | |
span = span.Slice(state.firstName.Length); | |
span[0] = ' '; | |
span = span.Slice(1); | |
state.middleName.AsSpan().CopyTo(span); | |
span = span.Slice(state.middleName.Length); | |
span[0] = ' '; | |
span = span.Slice(1); | |
state.lastName.AsSpan().CopyTo(span); | |
} | |
); | |
} | |
} | |
} |
Thanks David, I had no idea you could do this, it's a lot cleaner.
Very helpful thank you.
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You can also do string interpolation with the last example using TryWrite: