EgorBot for EgorBo in #109428

[EgorBot]

Processing dotnet/runtime#109428 (comment) command:

Command

-arm64 -profiler

using BenchmarkDotNet.Attributes;

public class Bencha
{
    static object obj = new MyClass();

    [Benchmark]
    public void Bench()
    {
        if (obj is MyClass myClass)
            myClass.DoWork();
    }
}

public class MyClass {
    public virtual void DoWork() {}
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on Arm64

BenchmarkDotNet v0.14.0, Ubuntu 24.04 LTS (Noble Numbat)
Arm64
  Job-SGHXNH : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-CSZJTB : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	Mean	Error	Ratio
Bench	Main	0.0022 ns	0.0002 ns	1.01
Bench	PR	0.0047 ns	0.0001 ns	2.17

BDN_Artifacts.zip

Profile for Bencha_Bench:

Flame graphs: Main vs PR 🔥
Speedscope: Main vs PR
Hot asm: Main vs PR
Hot functions: Main vs PR
Counters: Main vs PR

[EgorBot]

cc @EgorBo (logs)