Benchmarks for dotnet/runtime#129319 (for @jakobbotsch)

[EgorBot]

Processing benchmark request from PR dotnet/runtime#129319.

Targets: ubuntu24_azure_emeraldrapids
Commits: main;PR_129319

• ubuntu24_azure_emeraldrapids: live logs

Results will be posted here once they are ready.

[EgorBot]

Results for ubuntu24_azure_emeraldrapids

@jakobbotsch

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
INTEL XEON PLATINUM 8573C 2.30GHz, 1 CPU, 8 logical and 4 physical cores
.NET SDK 11.0.100-preview.6.26316.109
  [Host]     : .NET 10.0.9 (10.0.9, 10.0.926.27113), X64 RyuJIT x86-64-v4

Method	Toolchain	Mean	Error	Ratio
RefStruct_Foreach	PR #129319	718.6 ns	7.06 ns	1.00
RefStruct_Foreach	main	723.7 ns	4.86 ns	1.01

Full logs

[EgorBo]

@EgorBot -windows_intel

using BenchmarkDotNet.Attributes;
using System;
using System.Buffers;

public class ArrayPoolForeachRepro
{
    private const int Size = 1000;

    [Benchmark]
    public int RefStruct_Foreach()
    {
        using var wrapper = new SpanWrapper(Size);

        for (var i = 0; i < Size; i++)
            wrapper.Span[i] = i * 2;

        var sum = 0;
        var span = wrapper.Span;
        foreach (ref readonly var value in span)
            sum += value;

        return sum;
    }

    private readonly ref struct SpanWrapper
    {
        private readonly int[] m_Array;
        public readonly Span<int> Span;

        public SpanWrapper(int length)
        {
            m_Array = ArrayPool<int>.Shared.Rent(length);
            Span = new Span<int>(m_Array, 0, length);
        }

        public void Dispose() => ArrayPool<int>.Shared.Return(m_Array);
    }
}

[EgorBot]

Benchmark job submitted. The results will be posted here once they are ready.

• windows_azure_emeraldrapids: live logs

[jakobbotsch]

@EgorBot -windows_amd --envvars DOTNET_JitDisasm:RefStruct_Foreach

using BenchmarkDotNet.Attributes;
using System;
using System.Buffers;

public class ArrayPoolForeachRepro
{
    private const int Size = 1000;

    [Benchmark]
    public int RefStruct_Foreach()
    {
        using var wrapper = new SpanWrapper(Size);

        for (var i = 0; i < Size; i++)
            wrapper.Span[i] = i * 2;

        var sum = 0;
        var span = wrapper.Span;
        foreach (ref readonly var value in span)
            sum += value;

        return sum;
    }

    private readonly ref struct SpanWrapper
    {
        private readonly int[] m_Array;
        public readonly Span<int> Span;

        public SpanWrapper(int length)
        {
            m_Array = ArrayPool<int>.Shared.Rent(length);
            Span = new Span<int>(m_Array, 0, length);
        }

        public void Dispose() => ArrayPool<int>.Shared.Return(m_Array);
    }
}

[EgorBot]

Benchmark job submitted. The results will be posted here once they are ready.

• windows_azure_turin: live logs

[EgorBot]

Results for windows_azure_emeraldrapids

@EgorBo

BenchmarkDotNet v0.15.8, Windows 11 (10.0.26100.32995/24H2/2024Update/HudsonValley) (Hyper-V)
INTEL XEON PLATINUM 8573C 2.30GHz, 1 CPU, 8 logical and 4 physical cores
.NET SDK 11.0.100-preview.6.26316.109
  [Host]     : .NET 10.0.9 (10.0.9, 10.0.926.27113), X64 RyuJIT x86-64-v4

Method	Toolchain	Mean	Error	Ratio
RefStruct_Foreach	PR #129319	645.8 ns	1.76 ns	1.00
RefStruct_Foreach	main	650.6 ns	9.65 ns	1.01

Full logs

[EgorBot]

Results for windows_azure_turin

@jakobbotsch

BenchmarkDotNet v0.15.8, Windows 11 (10.0.26100.32995/24H2/2024Update/HudsonValley) (Hyper-V)
AMD EPYC 9V45 2.60GHz, 1 CPU, 8 logical and 4 physical cores
.NET SDK 11.0.100-preview.6.26316.109
  [Host]     : .NET 10.0.9 (10.0.9, 10.0.926.27113), X64 RyuJIT x86-64-v4

EnvironmentVariables=DOTNET_JitDisasm=RefStruct_Foreach  

Method	Toolchain	Mean	Error	Ratio
RefStruct_Foreach	PR #129319	483.8 ns	9.17 ns	1.00
RefStruct_Foreach	main	488.1 ns	9.51 ns	1.01

Full logs