Created
July 3, 2018 22:40
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Span<T> benchmarks
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| using BenchmarkDotNet.Attributes; | |
| using BenchmarkDotNet.Attributes.Jobs; | |
| using BenchmarkDotNet.Running; | |
| using System; | |
| using System.ComponentModel; | |
| namespace PropertyCache | |
| { | |
| [ClrJob, MonoJob, CoreJob] | |
| [MemoryDiagnoser] | |
| public class Benchmarks | |
| { | |
| static void Main(string[] args) | |
| { | |
| BenchmarkRunner.Run<Benchmarks>(); | |
| } | |
| [GlobalSetup] | |
| public void Setup() | |
| { | |
| var bytes = new byte[100]; | |
| new Random(42).NextBytes(bytes); | |
| stringNumbers = string.Join(";", Array.ConvertAll(bytes, Convert.ToInt32)); | |
| } | |
| public static string stringNumbers = string.Empty; | |
| public static string contentLength = "content-length:534"; | |
| [Benchmark] | |
| public static int SumStringNumbers() | |
| { | |
| int sum = 0; | |
| var numbers = stringNumbers.Split(";"); | |
| foreach (var num in numbers) | |
| { | |
| sum += int.Parse(num); | |
| } | |
| return sum; | |
| } | |
| [Benchmark] | |
| public static int SumStringNumbersWithSpan() | |
| { | |
| int sum = 0; | |
| ReadOnlySpan<char> span = stringNumbers; | |
| while (true) | |
| { | |
| int index = span.IndexOf(';'); | |
| if (index == -1) | |
| { | |
| sum += int.Parse(span); | |
| break; | |
| } | |
| sum += int.Parse(span.Slice(0, index)); | |
| span = span.Slice(index + 1); | |
| } | |
| return sum; | |
| } | |
| [Benchmark] | |
| public static int ParseContentLength() => Int32.Parse(contentLength.Substring(15)); | |
| [Benchmark] | |
| public static int ParseContentLengthWithSpan() => Int32.Parse(contentLength.AsSpan().Slice(15)); | |
| } | |
| } |
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