Created
December 9, 2018 18:56
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using System; | |
using BenchmarkDotNet.Attributes; | |
using static BenchmarkDotNet.Diagnosers.HardwareCounter; | |
namespace Benchmarks.Branching | |
{ | |
internal class ReferenceType | |
{ | |
public int Value; | |
} | |
internal struct ValueType | |
{ | |
public int Value; | |
} | |
internal struct ExtendedValueType | |
{ | |
public int Value; | |
private double _otherData; | |
} | |
[HardwareCounters(CacheMisses, BranchInstructions, BranchMispredictions)] | |
public class ClassVsStruct | |
{ | |
private ReferenceType[] _referenceTypeData; | |
private ValueType[] _valueTypeData; | |
private ExtendedValueType[] _extendedValueTypeData; | |
private int[] _data; | |
[Params(100, 500, 1000/*, 10000, 100_000*/)] | |
public int Size { get; set; } | |
[GlobalSetup] | |
public void GlobalSetup() | |
{ | |
_referenceTypeData = new ReferenceType[Size]; | |
_valueTypeData = new ValueType[Size]; | |
_extendedValueTypeData = new ExtendedValueType[Size]; | |
_data = new int[Size]; | |
var random = new Random(); | |
for (var i = 0; i < Size; i++) | |
{ | |
_data[i] = random.Next(100000); | |
_referenceTypeData[i] = new ReferenceType { Value = _data[i] }; | |
_valueTypeData[i] = new ValueType { Value = _data[i] }; | |
_extendedValueTypeData[i] = new ExtendedValueType { Value = _data[i] }; | |
} | |
} | |
[Benchmark(Baseline = true)] | |
public int ReferenceTypeSum() | |
{ | |
var sum = 0; | |
for (var i = 0; i < Size; i++) | |
{ | |
sum += _referenceTypeData[i].Value; | |
} | |
return sum; | |
} | |
[Benchmark] | |
public int ValueTypeSum() | |
{ | |
var sum = 0; | |
for (var i = 0; i < Size; i++) | |
{ | |
sum += _valueTypeData[i].Value; | |
} | |
return sum; | |
} | |
[Benchmark] | |
public int ExtendedValueTypeSum() | |
{ | |
var sum = 0; | |
for (var i = 0; i < Size; i++) | |
{ | |
sum += _extendedValueTypeData[i].Value; | |
} | |
return sum; | |
} | |
} | |
} |
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