namespace Benchmark {

    using System;

    class OpCodes {
        public static object v_add_10 = new object();
        public static object v_mul_2 = new object();
        public static object v_sub_3 = new object();
    }

    class Benchmark {
        
        private static Random random = new Random();

        private static object randomOpcode()
        {
            int n = random.Next(3);
            if (n==0)
                return OpCodes.v_add_10;
            else if (n==1)
                return OpCodes.v_mul_2;
            else
                return OpCodes.v_sub_3;
        }

        private static object[] randomBytecode(int N)
        {
            object[] bytecode = new object[N];
            for(int i=0; i<N; i++)
                bytecode[i] = randomOpcode();
            return bytecode;
        }

        public static void Main(string[] argv)
        {
            if (argv.Length != 1) {
                Console.WriteLine("Usage: benchmark.exe length");
                return;
            }

            int N = Convert.ToInt32(argv[0]);
            object[] bytecode = randomBytecode(N);

            DateTime start, end;
            int result;

            start = DateTime.UtcNow;
            result = NormalSwitch.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("NormalSwitch = {0}\t {1} secs", result, end-start);

            start = DateTime.UtcNow;
            result = FlexSwitch2.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch2  = {0}\t {1} secs", result, end-start);

            start = DateTime.UtcNow;
            result = FlexSwitch3.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch3  = {0}\t {1} secs", result, end-start);

            start = DateTime.UtcNow;
            result = FlexSwitch4.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch4  = {0}\t {1} secs", result, end-start);

            start = DateTime.UtcNow;
            result = FlexSwitch5.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch5  = {0}\t {1} secs", result, end-start);

            start = DateTime.UtcNow;
            result = FlexSwitch6.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch6  = {0}\t {1} secs", result, end-start);

            // commented out as it way slower and we don't even want to know how much :-)
            /*
            start = DateTime.UtcNow;
            result = FlexSwitch.Test.interpret(bytecode);
            end = DateTime.UtcNow;
            Console.WriteLine("FlexSwitch   = {0}\t {1} secs", result, end-start);
            */
        }
    }


}