s2kw · August 29, 2015 13:56 · s2kw · Feb 25, 2014 · s2kw · Feb 25, 2014
diff --git a/LinqVSForeach.cs b/LinqVSForeach.cs
 using System;
 using System.Text;
 using System.Linq;
 using System.Collections.Generic;
 using System.Diagnostics; 
 using System.Threading; 

 namespace ConsoleApplication
 {
 	class Program{
 		private const int internalIterations = 1000;
 		private const int externalIterations = 100;
 		private const int dataSize = 1000;//100000;
 		private const int search = dataSize - 1;

 		private static readonly long[] resultsFirst = new long[externalIterations*2];
 		private static readonly long[] resultsWhereFirst = new long[externalIterations*2];
 		private static readonly long[] resultsForeach = new long[externalIterations*2];
 		private static readonly int[] data = Enumerable.Range(0, dataSize).ToArray();

 		static void Main(string[] args)
 		{
 			Stopwatch sw = new Stopwatch();
 			for (int i = 0; i < externalIterations; i++)
 			{
 				Console.WriteLine("Iteration {0} of {1}", i+1, externalIterations);
 				sw.Restart();
 				First();
 				sw.Stop();
 				resultsFirst[i*2] = sw.ElapsedTicks;
 				Console.WriteLine("     First : {0}", sw.ElapsedTicks);

 				sw.Restart();
 				WhereFirst();
 				sw.Stop();
 				resultsWhereFirst[i*2] = sw.ElapsedTicks;
 				Console.WriteLine("WhereFirst : {0}", sw.ElapsedTicks);

 				sw.Restart();
 				Foreach();
 				sw.Stop();
 				resultsForeach[i*2] = sw.ElapsedTicks;
 				Console.WriteLine("   Foreach : {0}", sw.ElapsedTicks);

 				sw.Restart();
 				Foreach();
 				sw.Stop();
 				resultsForeach[i*2+1] = sw.ElapsedTicks;
 				Console.WriteLine("   Foreach : {0}", sw.ElapsedTicks);

 				sw.Restart();
 				WhereFirst();
 				sw.Stop();
 				resultsWhereFirst[(i*2)+1] = sw.ElapsedTicks;
 				Console.WriteLine("WhereFirst : {0}", sw.ElapsedTicks);

 				sw.Restart();
 				First();
 				sw.Stop();
 				resultsFirst[(i*2)+1] = sw.ElapsedTicks;
 				Console.WriteLine("     First : {0}", sw.ElapsedTicks);
 			}

 			Console.WriteLine("Done!");
 			Console.WriteLine("Averages:");
 			Console.WriteLine("     First Average: {0:0.00}", resultsFirst.Average());
 			Console.WriteLine("WhereFirst Average: {0:0.00}", resultsWhereFirst.Average());
 			Console.WriteLine("   Foreach Average: {0:0.00}", resultsForeach.Average());

 		}
 		private static void WhereFirst()
 		{
 			for (int i = 0; i < internalIterations; i++)
 			{
 				int item = data.Where(d => d == search).First();
 			}
 		}
 		private static void First()
 		{
 			for (int i = 0; i < internalIterations; i++)
 			{
 				int item = data.First(d => d == search);
 			}
 		}
 		private static void Foreach()
 		{
 			for (int i = 0; i < internalIterations; i++)
 				foreach (var d in data )
 				{
 					int item = d;
 					// ver 2
 					if(item == (internalIterations -1 ))
 						break;
 				}
 		}
 	}

 }
	using System;
	using System.Text;
	using System.Linq;
	using System.Collections.Generic;
	using System.Diagnostics;
	using System.Threading;

	namespace ConsoleApplication
	{
	class Program{
	private const int internalIterations = 1000;
	private const int externalIterations = 100;
	private const int dataSize = 1000;//100000;
	private const int search = dataSize - 1;

	private static readonly long[] resultsFirst = new long[externalIterations*2];
	private static readonly long[] resultsWhereFirst = new long[externalIterations*2];
	private static readonly long[] resultsForeach = new long[externalIterations*2];
	private static readonly int[] data = Enumerable.Range(0, dataSize).ToArray();

	static void Main(string[] args)
	{
	Stopwatch sw = new Stopwatch();
	for (int i = 0; i < externalIterations; i++)
	{
	Console.WriteLine("Iteration {0} of {1}", i+1, externalIterations);
	sw.Restart();
	First();
	sw.Stop();
	resultsFirst[i*2] = sw.ElapsedTicks;
	Console.WriteLine(" First : {0}", sw.ElapsedTicks);

	sw.Restart();
	WhereFirst();
	sw.Stop();
	resultsWhereFirst[i*2] = sw.ElapsedTicks;
	Console.WriteLine("WhereFirst : {0}", sw.ElapsedTicks);

	sw.Restart();
	Foreach();
	sw.Stop();
	resultsForeach[i*2] = sw.ElapsedTicks;
	Console.WriteLine(" Foreach : {0}", sw.ElapsedTicks);

	sw.Restart();
	Foreach();
	sw.Stop();
	resultsForeach[i*2+1] = sw.ElapsedTicks;
	Console.WriteLine(" Foreach : {0}", sw.ElapsedTicks);

	sw.Restart();
	WhereFirst();
	sw.Stop();
	resultsWhereFirst[(i*2)+1] = sw.ElapsedTicks;
	Console.WriteLine("WhereFirst : {0}", sw.ElapsedTicks);

	sw.Restart();
	First();
	sw.Stop();
	resultsFirst[(i*2)+1] = sw.ElapsedTicks;
	Console.WriteLine(" First : {0}", sw.ElapsedTicks);
	}

	Console.WriteLine("Done!");
	Console.WriteLine("Averages:");
	Console.WriteLine(" First Average: {0:0.00}", resultsFirst.Average());
	Console.WriteLine("WhereFirst Average: {0:0.00}", resultsWhereFirst.Average());
	Console.WriteLine(" Foreach Average: {0:0.00}", resultsForeach.Average());

	}
	private static void WhereFirst()
	{
	for (int i = 0; i < internalIterations; i++)
	{
	int item = data.Where(d => d == search).First();
	}
	}
	private static void First()
	{
	for (int i = 0; i < internalIterations; i++)
	{
	int item = data.First(d => d == search);
	}
	}
	private static void Foreach()
	{
	for (int i = 0; i < internalIterations; i++)
	foreach (var d in data )
	{
	int item = d;
	// ver 2
	if(item == (internalIterations -1 ))
	break;
	}
	}
	}

	}