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IterateFor.cs
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IterateFor.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Extensions;
using MicroBenchmarks;
namespace System.Collections
{
[BenchmarkCategory(Categories.Runtime, Categories.Libraries, Categories.Collections, Categories.GenericCollections)]
[GenericTypeArguments(typeof(int))] // value type
[GenericTypeArguments(typeof(string))] // reference type
public class IterateFor<T>
{
[Params(Utils.DefaultCollectionSize)]
public int Size;
private T[] _array;
private List<T> _list;
private IList<T> _ilist;
private ImmutableArray<T> _immutablearray;
private ImmutableList<T> _immutablelist;
private ImmutableSortedSet<T> _immutablesortedset;
[GlobalSetup(Target = nameof(Array))]
public void SetupArray() => _array = ValuesGenerator.ArrayOfUniqueValues<T>(Size);
[Benchmark]
public T Array()
{
T result = default;
var collection = _array;
for (int i = 0; i < collection.Length; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(Span))]
public void SetupSpan() => _array = ValuesGenerator.ArrayOfUniqueValues<T>(Size);
[BenchmarkCategory(Categories.Span)]
[Benchmark]
public T Span()
{
T result = default;
var collection = new Span<T>(_array);
for (int i = 0; i < collection.Length; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(ReadOnlySpan))]
public void SetupReadOnlySpan() => _array = ValuesGenerator.ArrayOfUniqueValues<T>(Size);
[BenchmarkCategory(Categories.Span)]
[Benchmark]
public T ReadOnlySpan()
{
T result = default;
var collection = new ReadOnlySpan<T>(_array);
for (int i = 0; i < collection.Length; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(List))]
public void SetupList() => _list = new List<T>(ValuesGenerator.ArrayOfUniqueValues<T>(Size));
[Benchmark]
public T List()
{
T result = default;
var collection = _list;
for(int i = 0; i < collection.Count; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(IList))]
public void SetupIList() => _ilist = new List<T>(ValuesGenerator.ArrayOfUniqueValues<T>(Size));
[Benchmark]
[BenchmarkCategory(Categories.Runtime, Categories.Virtual)]
public T IList() => Get(_ilist);
[MethodImpl(MethodImplOptions.NoInlining)]
private T Get(IList<T> collection)
{
T result = default;
for (int i = 0; i < collection.Count; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(ImmutableArray))]
public void SetupImmutableArray() => _immutablearray = Immutable.ImmutableArray.CreateRange<T>(ValuesGenerator.ArrayOfUniqueValues<T>(Size));
[Benchmark]
public T ImmutableArray()
{
T result = default;
var collection = _immutablearray;
for(int i = 0; i < collection.Length; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(ImmutableList))]
public void SetupImmutableList() => _immutablelist = Immutable.ImmutableList.CreateRange<T>(ValuesGenerator.ArrayOfUniqueValues<T>(Size));
[Benchmark]
public T ImmutableList()
{
T result = default;
var collection = _immutablelist;
for(int i = 0; i < collection.Count; i++)
result = collection[i];
return result;
}
[GlobalSetup(Target = nameof(ImmutableSortedSet))]
public void SetupImmutableSortedSet() => _immutablesortedset = Immutable.ImmutableSortedSet.CreateRange<T>(ValuesGenerator.ArrayOfUniqueValues<T>(Size));
[Benchmark]
public T ImmutableSortedSet()
{
T result = default;
var collection = _immutablesortedset;
for(int i = 0; i < collection.Count; i++)
result = collection[i];
return result;
}
}
}