泛型與普通方法、Object方法效率比較

泛型與普通方法、Object方法效率比較

簡介：

   方法的執行效率比較，首先考慮的就是執行方法時所耗費的時長，時長越短，效率越好，耗時越長，效率越差。下麵就從執行耗時方法考量三種方法的效率。

實現方法：

        static void Main(string[] args)
        {
            Monitor.Show();
        }
        public static void Show()
        {
            Console.WriteLine("****************Monitor******************");
            {
                int iValue = 12345;
                long commonSecond = 0;
                long objectSecond = 0;
                long genericSecond = 0;

                //普通方法
                {
                    Stopwatch watch = new Stopwatch();
                    watch.Start();
                    for (int i = 0; i < 1000000; i++)
                    {
                        ShowInt(iValue);
                    }
                    watch.Stop();
                    commonSecond = watch.ElapsedMilliseconds;
                }

                //Object
                {
                    Stopwatch watch = new Stopwatch();
                    watch.Start();
                    for (int i = 0; i < 1000000; i++)
                    {
                        ShowObject(iValue);
                    }
                    watch.Stop();
                    objectSecond = watch.ElapsedMilliseconds;
                }

                //泛型
                {
                    Stopwatch watch = new Stopwatch();
                    watch.Start();
                    for (int i = 0; i < 1000000; i++)
                    {
                        Show<int>(iValue);
                    }
                    watch.Stop();
                    genericSecond = watch.ElapsedMilliseconds;
                }
                Console.WriteLine("commonSecond={0},objectSecond={1},genericSecond={2}", commonSecond, objectSecond, genericSecond);
                Console.ReadKey();
            }
        }

        #region PrivateMethod
        private static void ShowInt(int iParameter)
        {
            //do nothing
        }
        private static void ShowObject(object oParameter)
        {
            //do nothing
        }
        private static void Show<T>(T tParameter)
        {
            //do nothing
        }
        #endregion

執行結果：

****************Monitor******************
commonSecond=3,objectSecond=9,genericSecond=3

顯然，泛型方法執行效率比較高。