EgorBot for EgorBo in #107218

EgorBot commented 2 weeks ago

Processing https://github.com/dotnet/runtime/pull/107218#issuecomment-2323427396:

-intel -arm64 -perf

using System;
using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

BenchmarkRunner.Run<Bench>(args: args);

public class Bench
{
    [Benchmark]
    public void Foo()
    {
        for (int i = 0; i < 1000; i++)
            Work<char>(1);
    }

    [MethodImpl(MethodImplOptions.NoInlining)]
    static void Work<T>(int size) => GC.KeepAlive(GC.AllocateArray<T>(size));
}

EgorBot commented 2 weeks ago

Benchmark results on `Intel`

BenchmarkDotNet v0.14.0, Ubuntu 22.04.4 LTS (Jammy Jellyfish)
Intel Xeon Platinum 8370C CPU 2.80GHz, 1 CPU, 16 logical and 8 physical cores
  Job-FGUAOD : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-ATHUWJ : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI

Method	Toolchain	Mean	Error	Ratio
Foo	Main	27.94 μs	0.287 μs	1.00
Foo	PR	26.85 μs	0.247 μs	0.96

BDN_Artifacts.zip

🔥 Flame graphs (Click to expand), Before: Main vs After:

Hot asm: Main vs PR Hot functions: Main vs PR

For clean perf results, make sure you have just one [Benchmark] in your app.

EgorBot commented 2 weeks ago

Build log

cc @EgorBo

EgorBot commented 2 weeks ago

Benchmark results on `Arm64`

BenchmarkDotNet v0.14.0, Ubuntu 22.04.4 LTS (Jammy Jellyfish)
Unknown processor
  Job-AHKYQS : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-TEJNGH : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD