泛型反射性能优化

一，泛型反射优化：基本思路，根据泛型缓存原理（静态构造+静态字段）

   public class Accessor
    {
        /// 

        /// 属性类型
        /// 
        public static PropertyInfo[] PropertyTypes { get; private set; }
        /// 

        /// 实体类型
        /// 
        public static Type type { get; private set; }

        static Accessor()
        {
            type = typeof(S);
            PropertyTypes = type.GetProperties();
        }
    }

二，调用逻辑

 Stopwatch st = new Stopwatch();
            st.Start();

            for (int i = 0; i < 10000000; i++)
            {
                var ss = Accessor.PropertyTypes;
            }
            st.Stop();
            var str1 = st.ElapsedMilliseconds.ToString();


            st.Reset();
            st.Start();
            for (int i = 0; i < 10000000; i++)
            {
                Type type = typeof(Person);
                var ss = type.GetProperties();
            }
            st.Stop();
            var str2 = st.ElapsedMilliseconds.ToString();