EgorBot for EgorBo in #111636

[EgorBot]

Processing dotnet/runtime#111636 (comment) command:

Command

-linux_azure_cobalt100 -linux_azure_ampere -profiler

using BenchmarkDotNet.Attributes;

public class MyBench
{
    object Dst1;
    object Dst2;
    object Dst3;
    object Dst4;

    static object Value = new();

    [Benchmark]
    public void WB_nonephemeral()
    {
        // Write non-ephemeral reference
        Dst1 = Value;
        Dst2 = Value;
        Dst3 = Value;
        Dst4 = Value;
    }

    [Benchmark]
    public void WB_ephemeral()
    {
        // Write non-ephemeral reference
        Dst1 = new object();
    }
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_azure_cobalt100

BenchmarkDotNet v0.14.0, Ubuntu 24.04.1 LTS (Noble Numbat)
azure_cobalt100
  Job-BPVCFV : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-OGPAOF : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	Mean	Error	Ratio
WB_nonephemeral	Main	4.279 ns	0.0031 ns	1.00
WB_nonephemeral	PR	5.553 ns	0.0029 ns	1.30
WB_ephemeral	Main	5.359 ns	0.0110 ns	1.00
WB_ephemeral	PR	6.435 ns	0.0197 ns	1.20

BDN_Artifacts.zip

Profiling for MyBench_WB_ephemeral:

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

Profiling for MyBench_WB_nonephemeral:

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

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

[EgorBot]

Benchmark results on linux_azure_ampere

BenchmarkDotNet v0.14.0, Ubuntu 24.04.1 LTS (Noble Numbat)
azure_ampere
  Job-JZLAMQ : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD
  Job-SEKTJT : .NET 10.0.0 (42.42.42.42424), Arm64 RyuJIT AdvSIMD

Method	Toolchain	Mean	Error	Ratio
WB_nonephemeral	Main	13.76 ns	0.003 ns	1.00
WB_nonephemeral	PR	15.12 ns	0.002 ns	1.10
WB_ephemeral	Main	10.14 ns	0.063 ns	1.00
WB_ephemeral	PR	11.72 ns	0.097 ns	1.16

BDN_Artifacts.zip

Profiling for MyBench_WB_ephemeral:

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

Profiling for MyBench_WB_nonephemeral:

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

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