BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19044.1739 (21H2)
Intel Core i5-3570K CPU 3.40GHz (Ivy Bridge), 1 CPU, 4 logical and 4 physical cores
.NET SDK=6.0.300
[Host] : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
0_STD : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
1_PGO : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
2_NOT : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
| Method | Job | EnvironmentVariables | Mean | Error | StdDev | Ratio | RatioSD | Allocated |
|---|---|---|---|---|---|---|---|---|
| DictionaryLookup | 0_STD | Empty | 22.74 μs | 0.066 μs | 0.055 μs | 1.00 | 0.00 | - |
| ImmutableDictionaryLookup | 0_STD | Empty | 78.82 μs | 0.212 μs | 0.198 μs | 3.47 | 0.01 | - |
| CsPersistentHashMap | 0_STD | Empty | 37.13 μs | 0.096 μs | 0.090 μs | 1.63 | 0.01 | - |
| FsPersistentHashMap | 0_STD | Empty | 38.88 μs | 0.135 μs | 0.113 μs | 1.71 | 0.01 | - |
| DictionaryLookup | 1_PGO | DOTNET_TieredPGO=1,DOTNET_TC_QuickJitForLoops=1,DOTNET_ReadyToRun=0 | 17.75 μs | 0.085 μs | 0.079 μs | 1.00 | 0.00 | - |
| ImmutableDictionaryLookup | 1_PGO | DOTNET_TieredPGO=1,DOTNET_TC_QuickJitForLoops=1,DOTNET_ReadyToRun=0 | 71.80 μs | 0.188 μs | 0.176 μs | 4.05 | 0.02 | - |
| CsPersistentHashMap | 1_PGO | DOTNET_TieredPGO=1,DOTNET_TC_QuickJitForLoops=1,DOTNET_ReadyToRun=0 | 30.10 μs | 0.067 μs | 0.059 μs | 1.70 | 0.01 | - |
| FsPersistentHashMap | 1_PGO | DOTNET_TieredPGO=1,DOTNET_TC_QuickJitForLoops=1,DOTNET_ReadyToRun=0 | 29.02 μs | 0.078 μs | 0.073 μs | 1.64 | 0.01 | - |
| DictionaryLookup | 2_NOT | DOTNET_TieredCompilation=0 | 25.09 μs | 0.089 μs | 0.083 μs | 1.00 | 0.00 | - |
| ImmutableDictionaryLookup | 2_NOT | DOTNET_TieredCompilation=0 | 94.15 μs | 0.298 μs | 0.279 μs | 3.75 | 0.01 | - |
| CsPersistentHashMap | 2_NOT | DOTNET_TieredCompilation=0 | 40.43 μs | 0.138 μs | 0.116 μs | 1.61 | 0.00 | - |
| FsPersistentHashMap | 2_NOT | DOTNET_TieredCompilation=0 | 37.81 μs | 0.098 μs | 0.091 μs | 1.51 | 0.01 | - |
Easily fixed but bit confusing
cd ./src/FsFunctionalTest/
dotnet run -c Releasecd ./src/FsPerformanceTest/
# Default .NET6 Jitter
# Powershell's way of clearing environment variables
Remove-Item "env:DOTNET_TieredCompilation"
Remove-Item "env:DOTNET_TieredPGO"
Remove-Item "env:DOTNET_TC_QuickJitForLoops"
Remove-Item "env:DOTNET_ReadyToRun"
dotnet run -c Release
# New Dynamic PGO .NET6 Jitter
# Powershell's way of setting environment variables
$env:DOTNET_TieredPGO=1
$env:DOTNET_TC_QuickJitForLoops=1
$env:DOTNET_ReadyToRun=0
dotnet run -c Release
# Turn of tiered jitting
$env:DOTNET_TieredCompilation=0
dotnet run -c Release