Implement a faster encoding algoritm for varint #98
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In .NET 6 and later we can use intrinsics, especially on Intel, to encode the length as a varint more quickly. This isn't a huge difference given the overall cost of compression but may still be worthwhile. BenchmarkDotNet v0.13.10, Windows 11 (10.0.22631.3880/23H2/2023Update/SunValley3) 12th Gen Intel Core i7-1270P, 1 CPU, 16 logical and 12 physical cores .NET SDK 8.0.303 [Host] : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2 DefaultJob : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2 | Method | Value | Mean | Error | StdDev | Ratio | Rank | |-------- |------ |---------:|----------:|----------:|------:|-----:| | Current | 0 | 1.385 ns | 0.0176 ns | 0.0164 ns | 1.00 | 2 | | New | 0 | 1.091 ns | 0.0200 ns | 0.0188 ns | 0.79 | 1 | | | | | | | | | | Current | 256 | 1.599 ns | 0.0282 ns | 0.0220 ns | 1.00 | 2 | | New | 256 | 1.340 ns | 0.0104 ns | 0.0081 ns | 0.84 | 1 | | | | | | | | | | Current | 65536 | 1.593 ns | 0.0132 ns | 0.0117 ns | 1.00 | 2 | | New | 65536 | 1.367 ns | 0.0181 ns | 0.0169 ns | 0.86 | 1 |
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In .NET 6 and later we can use intrinsics, especially on Intel, to encode the length as a varint more quickly. This isn't a huge difference given the overall cost of compression but may still be worthwhile.
BenchmarkDotNet v0.13.10, Windows 11 (10.0.22631.3880/23H2/2023Update/SunValley3) 12th Gen Intel Core i7-1270P, 1 CPU, 16 logical and 12 physical cores .NET SDK 8.0.303
[Host] : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2
DefaultJob : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2