Benchmarks for #123027 (EgorBo) #586
Description
Processing dotnet/runtime#123027 (comment) command:
Command
-windows_intel -amd -intel --runtimes net8.0 net10.0
using BenchmarkDotNet.Attributes;
using System;
[MemoryDiagnoser]
public class Benchmarks
{
const int N = 1000000;
float[] _data;
[GlobalSetup]
public void Setup()
{
_data = new float[N];
for (int i = 0; i < N; i++) _data[i] = 1;
}
[Benchmark]
public double Iterate_With_Array()
{
double result = 0;
for (int i = 0; i < N; i++)
{
result += _data[i];
}
return result;
}
[Benchmark]
public double Iterate_With_Span()
{
double result = 0;
Span<float> span = _data;
for (int i = 0; i < N; i++)
{
result += span[i];
}
return result;
}
[Benchmark]
public double Iterate_With_SpanWrapper()
{
double result = 0;
SpanWrapper<float> span = new(_data);
for (int i = 0; i < N; i++)
{
result += span[i];
}
return result;
}
[Benchmark]
public double Iterate_With_ArrayWrapper()
{
double result = 0;
ArrayWrapper<float> span = new(_data);
for (int i = 0; i < N; i++)
{
result += span[i];
}
return result;
}
[Benchmark]
public double Iterate_With_ArrayWrapperPoor()
{
double result = 0;
ArrayWrapperPoor<float> span = new(_data);
for (int i = 0; i < N; i++)
{
result += span[i];
}
return result;
}
}
public readonly ref struct SpanWrapper<T>
{
private readonly Span<T> _span;
public SpanWrapper(Span<T> span)
{
_span = span;
}
public ref T this[int index]
=> ref _span[index];
}
public readonly ref struct ArrayWrapper<T>(T[] array)
{
public ref T this[int index]
=> ref array[index];
}
public readonly ref struct ArrayWrapperPoor<T>(T[] array)
{
public ref T this[int index]
=> ref array.AsSpan()[index];
}(EgorBot will reply in this issue)