prefix_postfix_performance_test.cs

using System;

class Program
{
	const int MAX_TEST = 100;
	const int MAX_PHASE = 10;
	const int MAX_LOOP = 10000000;

	public static void Main ( string [] args )
	{
		Console.WriteLine ( "========================================" );
		Console.WriteLine ( "* OS: {0} {1}", Environment.OSVersion.Platform,
			Environment.OSVersion.VersionString );
		Console.WriteLine ( "* Is 64bit OS? {0}", Environment.Is64BitOperatingSystem );
		Console.WriteLine ( "========================================" );

		int prefixWon = 0, postfixWon = 0;
		bool [] patternOfWon = new bool [ MAX_TEST ];
		for ( int k = 0; k < MAX_TEST; ++k )
		{
			Console.WriteLine ( "Performance Test of {0}", k + 1 );
			Console.WriteLine ( "========================================" );
			Console.WriteLine ( "++i Performance Test:" );
			TimeSpan prefixTimeSpan = new TimeSpan ();
			for ( int i = 0; i < MAX_PHASE; ++i )
			{
				TimeSpan startTimeSpan = DateTime.Now.TimeOfDay;
				for ( int j = 0; j < MAX_LOOP; ++j )
					;
				TimeSpan endTimeSpan = DateTime.Now.TimeOfDay;
				prefixTimeSpan += ( endTimeSpan - startTimeSpan );
			}
			Console.WriteLine ( "Total of ++i: {0}", prefixTimeSpan );

			Console.WriteLine ( "----------------------------------------" );

			Console.WriteLine ( "i++ Performance Test:" );
			TimeSpan postfixTimeSpan = new TimeSpan ();
			for ( int i = 0; i < MAX_PHASE; ++i )
			{
				TimeSpan startTimeSpan = DateTime.Now.TimeOfDay;
				for ( int j = 0; j < MAX_LOOP; j++ )
					;
				TimeSpan endTimeSpan = DateTime.Now.TimeOfDay;
				postfixTimeSpan += ( endTimeSpan - startTimeSpan );
			}
			Console.WriteLine ( "Total of i++: {0}", postfixTimeSpan );

			Console.WriteLine ( "----------------------------------------" );
			Console.Write ( "Test {0} is won of ", k );
			ConsoleColor backupColor = Console.ForegroundColor;
			if ( postfixTimeSpan > prefixTimeSpan )
			{
				Console.ForegroundColor = ConsoleColor.DarkBlue;
				Console.WriteLine ( "prefix" );
				patternOfWon [ k ] = true;
				++prefixWon;
			}
			else
			{
				Console.ForegroundColor = ConsoleColor.DarkRed;
				Console.WriteLine ( "postfix" );
				patternOfWon [ k ] = false;
				++postfixWon;
			}
			Console.ForegroundColor = backupColor;

			Console.WriteLine ( "========================================" );
		}

		Console.WriteLine ( " Prefix: {0}", prefixWon );
		Console.WriteLine ( "Postfix: {0}", postfixWon );

		ConsoleColor backupColor2 = Console.BackgroundColor;
		foreach ( bool won in patternOfWon )
		{
			Console.BackgroundColor = ( won ) ? ConsoleColor.DarkBlue : ConsoleColor.DarkRed;
			Console.Write ( " " );
		}
		Console.BackgroundColor = backupColor2;
	}
}