C# Performance Best Practices
BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
Intel Core i5-7200U CPU 2.50GHz (Kaby Lake), 1 CPU, 4 logical and 2 physical cores
.NET Core SDK=5.0.203
[Host] : .NET Core 3.1.15 (CoreCLR 4.700.21.21202, CoreFX 4.700.21.21402), X64 RyuJIT
DefaultJob : .NET Core 3.1.15 (CoreCLR 4.700.21.21202, CoreFX 4.700.21.21402), X64 RyuJIT
| Method | Mean | Error | StdDev | Ratio | Gen 0 | Gen 1 | Gen 2 | Allocated | Code Size |
|---|---|---|---|---|---|---|---|---|---|
| LinqQuery | 717.29 ns | 3.509 ns | 3.111 ns | 1.00 | 0.4330 | - | - | 680 B | 1221 B |
| Lambda | 670.56 ns | 12.151 ns | 10.146 ns | 0.93 | 0.4320 | - | - | 680 B | 1221 B |
| Foreach | 777.00 ns | 6.240 ns | 6.129 ns | 1.08 | 0.3853 | - | - | 608 B | 622 B |
| For | 226.71 ns | 2.256 ns | 2.111 ns | 0.32 | 0.3619 | - | - | 568 B | 611 B |
| UnrolledFor | 218.02 ns | 3.269 ns | 3.058 ns | 0.30 | 0.3617 | - | - | 568 B | 1007 B |
| ForVectorized | 50.91 ns | 0.692 ns | 0.614 ns | 0.07 | 0.1172 | - | - | 184 B | 838 B |
| ForeachSorted | 224.16 ns | 3.653 ns | 3.417 ns | 0.31 | 0.3619 | - | - | 568 B | 775 B |
BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
Intel Core i5-7200U CPU 2.50GHz (Kaby Lake), 1 CPU, 4 logical and 2 physical cores
.NET Core SDK=5.0.203
[Host] : .NET Core 3.1.15 (CoreCLR 4.700.21.21202, CoreFX 4.700.21.21402), X64 RyuJIT
DefaultJob : .NET Core 3.1.15 (CoreCLR 4.700.21.21202, CoreFX 4.700.21.21402), X64 RyuJIT
| Method | Mean | Error | StdDev | Ratio | Code Size | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|---|---|
| LinqQuery | 854.0 ns | 5.63 ns | 4.70 ns | 1.00 | 1313 B | 0.4330 | - | - | 680 B |
| Lambda | 899.5 ns | 3.79 ns | 3.55 ns | 1.05 | 1313 B | 0.4330 | - | - | 680 B |
| Foreach | 961.3 ns | 5.72 ns | 5.35 ns | 1.12 | 801 B | 0.3872 | - | - | 608 B |
| For | 391.8 ns | 3.28 ns | 2.74 ns | 0.46 | 803 B | 0.3619 | - | - | 568 B |
| ForSorted | 310.7 ns | 2.62 ns | 2.19 ns | 0.36 | 823 B | 0.3619 | - | - | 568 B |
| ForVectorized | 108.3 ns | 1.89 ns | 2.02 ns | 0.13 | 1437 B | 0.1070 | - | - | 168 B |