EgorBot for EgorBo in #109036

[EgorBot]

Processing dotnet/runtime#109036 (comment) command:

Command

-amd -intel --envvars DOTNET_JitDisasm:Bestcase_IgnoreCase

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

public class Bench
{
    string s = "https://pkgs.dev.azure.com/dnceng/public/packaging/dotnet10/";

    [Benchmark]
    public bool Bestcase() => 
        s.StartsWith("https://pkgs.dev.azure.com/dnceng/public/pack", StringComparison.Ordinal);
    
    [Benchmark]
    public bool Bestcase_IgnoreCase() => 
        s.StartsWith("https://pkgs.dev.azure.com/dnceng/public/pack", StringComparison.OrdinalIgnoreCase);

    // Worst case: differs at 1st char:

    [Benchmark]
    public bool Worstcase() => 
        s.StartsWith("Xttps://pkgs.dev.azure.com/dnceng/public/pack", StringComparison.Ordinal);
    
    [Benchmark]
    public bool Worstcase_IgnoreCase() => 
        s.StartsWith("Xttps://pkgs.dev.azure.com/dnceng/public/pack", StringComparison.OrdinalIgnoreCase);
}

(EgorBot will reply in this issue)

[EgorBot]

Benchmark results on linux_milano

BenchmarkDotNet v0.14.0, Ubuntu 22.04.5 LTS (Jammy Jellyfish)
AMD EPYC 7763, 1 CPU, 8 logical and 4 physical cores
  Job-OOCTCF : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
  Job-WTYLTX : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
EnvironmentVariables=DOTNET_JitDisasm=Bestcase_IgnoreCase

Method	Toolchain	Mean	Error	Ratio
Bestcase	Main	4.348 ns	0.0008 ns	1.00
Bestcase	PR	4.359 ns	0.0018 ns	1.00
Bestcase_IgnoreCase	Main	6.200 ns	0.0009 ns	1.00
Bestcase_IgnoreCase	PR	6.518 ns	0.0013 ns	1.05
Worstcase	Main	2.181 ns	0.0003 ns	1.00
Worstcase	PR	1.661 ns	0.0041 ns	0.76
Worstcase_IgnoreCase	Main	4.962 ns	0.0013 ns	1.00
Worstcase_IgnoreCase	PR	5.264 ns	0.0046 ns	1.06

BDN_Artifacts.zip

cc @EgorBo (agent_logs.txt)

[EgorBot]

Benchmark results on linux_icelake

BenchmarkDotNet v0.14.0, Ubuntu 22.04.5 LTS (Jammy Jellyfish)
Intel Xeon Platinum 8370C CPU 2.80GHz, 1 CPU, 8 logical and 4 physical cores
  Job-ITFDTJ : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  Job-TBRSZA : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
EnvironmentVariables=DOTNET_JitDisasm=Bestcase_IgnoreCase

Method	Toolchain	Mean	Error	Ratio
Bestcase	Main	0.7713 ns	0.0002 ns	1.00
Bestcase	PR	0.7897 ns	0.0003 ns	1.02
Bestcase_IgnoreCase	Main	1.2811 ns	0.0013 ns	1.00
Bestcase_IgnoreCase	PR	2.3924 ns	0.0010 ns	1.87
Worstcase	Main	0.7716 ns	0.0001 ns	1.00
Worstcase	PR	1.5712 ns	0.0013 ns	2.04
Worstcase_IgnoreCase	Main	2.5611 ns	0.0003 ns	1.00
Worstcase_IgnoreCase	PR	1.2986 ns	0.0003 ns	0.51

BDN_Artifacts.zip

cc @EgorBo (agent_logs.txt)