EgorBot for PranavSenthilnathan in #111824

[EgorBot]

Processing dotnet/runtime#111824 (comment) command:

Command

-intel -profiler -commit main --envvars DOTNET_JitDisasm:Vector DOTNET_EnableAVX512F:0

using System.Text;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

// Actual runner is optional, but if it exists, it has to be like this:
BenchmarkSwitcher.FromAssembly(typeof(Bench).Assembly).Run(args);

public class Bench
{
    public int size = 512;

    public string encName = "utf-8";
    private Encoding _enc;
    private string _toEncode;
    private char[] _chars;
    [GlobalSetup]
    public void SetupGetBytes()
    {
        _enc = Encoding.GetEncoding(encName);
        _toEncode = CreateString(size);
        _chars = _toEncode.ToCharArray();
    }

    [Benchmark]
    [MemoryRandomization]
    public int GetByteCount() => _enc.GetByteCount(_chars);

    public static string CreateString(int length)
    {
        char[] str = new char[length];

        for (int i = 0; i < str.Length; i++)
        {
            // Add path separator so folders aren't too long.
            if (i % 20 == 0)
            {
                str[i] = Path.DirectorySeparatorChar;
            }
            else
            {
                str[i] = 'a';
            }
        }

        return new string(str);
    }
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_azure_cascadelake

BenchmarkDotNet v0.14.0, Ubuntu 24.04.1 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz, 1 CPU, 8 logical and 4 physical cores
  Job-ARUYEF : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
Job=Job-ARUYEF  OutlierMode=DontRemove  EnvironmentVariables=DOTNET_JitDisasm=*Vector*,DOTNET_EnableAVX512F=0
Toolchain=CoreRun  MemoryRandomization=True  StdDev=0.597 ns

Method	Mean	Error
GetByteCount	25.42 ns	0.537 ns

BDN_Artifacts.zip

Profiling for Bench_GetByteCount:

SVG flamegraph: Main 🔥
Speedscope flamegraph: Main
Hot asm code: Main
HW counters: Main

cc @PranavSenthilnathan (agent_logs.txt). EgorBot manual: link.