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Program.cs
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Program.cs
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namespace SetPerformance {
using System;
using System.Collections.Generic;
using Linq;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Reports;
using BenchmarkDotNet.Running;
[MemoryDiagnoser]
public class Program {
[Benchmark]
public void CoreLinqSet() {
IEnumerable<int> d = System.Linq.Enumerable.ToArray( System.Linq.Enumerable.Distinct( getData() ) );
}
[Benchmark]
public void OldSet() {
IEnumerable<int> d = getData().Distinct().ToArray();
}
[Benchmark]
public void NewSet() {
IEnumerable<int> d = getData().NewDistinct().ToArray();
}
[Benchmark]
public void HashSet() {
IEnumerable<int> d = System.Linq.Enumerable.ToArray( new HashSet<int>( getData() ) );
}
private static int[] data = null;
// private static int[] data = new int[260];
// private static int[] data = new int[1030];
// private static int[] data = new int[200_000];
private static int[] getData() {
if ( data != null ) {
return data;
}
// int size = 200000;
int size = 1030;
// int size = 260;
int reps = 1;
// int reps = 4;
int realSize = size / reps;
data = new int[size];
Random rng = new Random( 9001 );
int i = 0;
for ( ; i < realSize; i++ ) {
data[i] = rng.Next();
}
for ( int rep = 1; rep < reps; rep++ ) {
for ( ; i < realSize; i++ ) {
data[i] = data[i + rep * realSize];
}
}
return data;
}
private static void Main( string[] args ) {
// new Program().CoreLinqSet();
// new Program().NewSet();
// Random rng = new Random();
// List<int> ints = new();
// for ( int i = 0; i < 1030; i++ ) ints.Add( rng.Next() );
// Console.WriteLine( $"{{ {string.Join( ",\n ", ints )} }}" );
getData();
Summary summary = BenchmarkRunner.Run<Program>();
}
}
}