mgravell

BenchmarkDotNet v0.15.4, Linux Ubuntu 25.04 (Plucky Puffin)
Intel Core Ultra 7 155U 0.40GHz, 1 CPU, 14 logical and 12 physical cores
.NET SDK 9.0.110
  [Host]     : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3
  DefaultJob : .NET 9.0.9 (9.0.9, 9.0.925.41916), X64 RyuJIT x86-64-v3


| Method  | Length   | Mean             | Error          | StdDev           | Ratio | RatioSD | Allocated | Alloc Ratio |
|-------- |--------- |-----------------:|---------------:|-----------------:|------:|--------:|----------:|------------:|
| SHA1    | 1024     |      1,038.23 ns |      20.541 ns |        19.214 ns |  1.00 |    0.03 |         - |          NA |

mgravell

using System.Runtime.CompilerServices;

Foo foo = new Foo(5,6,7,8);

// scenario (why we're here): the GetRef method doesn't compile :(
// you cannot conveniently use by-ref return from struct methods
// or properties, because "this" is has scoped-like semantics;
// ("scoped" can be paraphrazed as "this reference is not captured
// or returned", i.e. it doesn't risk exposing the reference later)

mgravell

What is this

SE.Redis; working on stability+performance work - basically: removing all of "pipelines", "arenas", and a bunch of other things that are a decade of cumulative hacks, to a re-architected implementation designed from first principles with all the good things that didn't exist way back in the never.

Also, adding features and removing tech debt:

• cancellation supported from the outset on both sync+async paths
• zero-alloc routes if you can use a new API (damn you, Task!)

mgravell

using System;
using System.IO;
using System.Linq;

Checkerboard.DrawCheckerboard(Console.Out, 5);
Console.WriteLine();
Checkerboard.DrawCheckerboard(Console.Out, 8);
Console.WriteLine();

static class Checkerboard

mgravell

BenchmarkDotNet v0.14.0, Windows 11 (10.0.26120.1350)
AMD Ryzen 9 7900X, 1 CPU, 24 logical and 12 physical cores
.NET SDK 8.0.203
  [Host]     : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
  DefaultJob : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI


| Method | Number | Mean      | Error     | StdDev    | Median    |
|------- |------- |----------:|----------:|----------:|----------:|
| Fixed  | 8      | 0.6012 ns | 0.0042 ns | 0.0037 ns | 0.6014 ns |

mgravell

string src = "abc";

foreach (var chunk in src.Find(42))
{
    // woohoo, this compiles!
}

static class MyHelperExtensions
{
    // just exists to make the API available; "notImportant" is *all* of your

mgravell

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

BenchmarkRunner.Run<PunBench>();

mgravell

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System;
using System.Threading.Tasks;

#if DEBUG
var obj = new AsyncMachineryBenchmarks();
// we should have done 100 things (just yields) either way

mgravell

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.Buffers;
using System.Text.Json;

// prove impl
var obj = new MyBench { Count = 5 };
obj.Init();
Console.WriteLine(obj.Payload);
Console.WriteLine(string.Join(',', obj.Linq()));

mgravell

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.Numerics;

BenchmarkRunner.Run(typeof(ConcatBenchmark).Assembly);

[MemoryDiagnoser]
public class ConcatBenchmark
{
    private readonly int[] arr1 = new[] { 1, 2, 3, 4, 5, 0 },