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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); | |
| } | |
| ); | |
| } | |
| } | |
| } |
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