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using BenchmarkDotNet.Attributes; | |
using BenchmarkDotNet.Jobs; | |
namespace Storage.Benchmark.Glo; | |
[SimpleJob(RuntimeMoniker.Net60)] | |
[SimpleJob(RuntimeMoniker.NetCoreApp31)] | |
[SimpleJob(RuntimeMoniker.Net48)] | |
[MeanColumn] | |
public class DictionaryGetWriteValueBenchmark | |
{ | |
[Benchmark(Baseline = true)] | |
public int Dictionary() | |
{ | |
var dictionary = _dictionary; | |
var sum = 0; | |
foreach (var key in _keys) | |
{ | |
var value = dictionary[key]; | |
sum += value; | |
dictionary[key] = sum; | |
} | |
return sum; | |
} | |
[Benchmark] | |
public int DictionaryMarshal() | |
{ | |
var dictionary = _dictionary; | |
var sum = 0; | |
foreach (var key in _keys) | |
{ | |
#if NET6_0 | |
ref var value = ref System.Runtime.InteropServices.CollectionsMarshal.GetValueRefOrNullRef(dictionary, key); | |
sum += value; | |
value = sum; | |
#else | |
var value = dictionary[key]; | |
sum += value; | |
dictionary[key] = sum; | |
#endif | |
} | |
return sum; | |
} | |
[Benchmark] | |
public int Glossary() | |
{ | |
var glossary = _glossary; | |
var sum = 0; | |
foreach (var key in _keys) | |
{ | |
ref var value = ref glossary.GetValue(key); | |
sum += value; | |
value = sum; | |
} | |
return sum; | |
} | |
#region Configuration | |
private Dictionary<int, int> _dictionary = null!; | |
private Glossary<int> _glossary; | |
private int[] _keys = null!; | |
[GlobalSetup] | |
public void Init() | |
{ | |
const int count = 1021; | |
_dictionary = new Dictionary<int, int>(count); | |
_glossary = new Glossary<int>(count); | |
_keys = Enumerable.Range(0, count).ToArray(); | |
for (var i = 0; i < count; i++) | |
{ | |
var number = _keys[i]; | |
_dictionary.Add(number, number); | |
_glossary.Add(number, number); | |
} | |
Shuffle(_keys, new Random(1234)); | |
} | |
private static void Shuffle<T>(T[] array, Random random) | |
{ | |
var n = array.Length; | |
while (n > 1) | |
{ | |
var k = random.Next(n--); | |
(array[n], array[k]) = (array[k], array[n]); | |
} | |
} | |
#endregion | |
} |
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