test.cs

test.cs

		[DllImport("foo", CallingConvention = CallingConvention.Cdecl)]
		static extern int GetHashNative(string str);

		static int GetHashManaged(string str)
		{
			int hash = 0;
			if (string.IsNullOrEmpty(str))
				return hash;

			for (int i = 0; i < str.Length; i++)
				hash = char.ToLower(str[i]) + (hash << 6) + (hash << 16) - hash;

			return hash;
		}

		static void Main()
		{
			string words = "qwertyuiopasdfghjklzxcvbnm_123";
			string w = "";
			Stopwatch sw = Stopwatch.StartNew();
			for (int i = 0; i < 1000; i++)
			{
				w += words[i % words.Length];
				var code = GetHashManaged(w);
				//var code = GetHashNative(w);
			}
			sw.Stop();
			System.Console.WriteLine("elapsed: " + sw.ElapsedMilliseconds);
    }