替换的效率测试（MS VS MY）

因为进来公司要给其他公司提供数据，数据中有字符要替换。有两种替换方法
 
代码1：

public static void Main()
    {

            string input1 = "";

            
            StringBuilder sb1 = new StringBuilder();
            for(int i =0 ; i < 50000; i++)
            {
                sb1.Append("wo\r");
            }
            
            input1 = sb1.ToString();
            
            WL("sb Test Date is complate..");
            
            Stopwatch sw1 = new Stopwatch();
        
            
            //char
            sw1.Start();
            StringBuilder sb = new StringBuilder();
            if (input1 != String.Empty) 
            {
                for (int i = 0; i < input1.Length; i++) 
                {
                    switch (input1[i]) 
                    {
                        case (char)13:
                            sb.Append(" ");
                            break;
                        case (char)10:
                            sb.Append(" ");
                            break;
                        default:
                            sb.Append(input1[i]);
                            break;
                    }
                }
                input1 =  sb.ToString();
            }
            sw1.Stop();
            
            
            WL(sw1.ElapsedMilliseconds+ "毫秒");
        
            
        RL();
    }

代码2：

public static void Main()
    {
    
        string input1 = "";

            
            StringBuilder sb1 = new StringBuilder();
            for(int i =0 ; i < 50000; i++)
            {
                sb1.Append("wo\r");
            }
            
            input1 = sb1.ToString();
            
            WL("replace Test Date is complate..");
            
            Stopwatch sw1 = new Stopwatch();
        
            
            //char
            sw1.Start();
            input1 = input1.Replace("\r"," ");
            input1 = input1.Replace("\n"," ");
            sw1.Stop();
            
            
            WL(sw1.ElapsedMilliseconds+ "毫秒");
        
        
        RL();
    }

Figure1： 6s
Figure2：3s