decimal.TryParse和Convert.ToDecimal+try{} catch{}的性能比较

Posted 2020-12-21 lywu

先说结论：decimal.TryParse性能远远超过try{} catch{}，毕竟异常处理非常耗时间，至于decimal.TryParse的内部实现还不清楚，等项目结束再做调查。

源码：

using System;
using System.Diagnostics;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            decimal result;
            string value = "test";
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            for (int i = 0; i < 10000; i++)
            {
                result = decimal.TryParse(value.ToString(), out result) ? result : 0;
            }
            stopwatch.Stop();
            Console.WriteLine(stopwatch.Elapsed.TotalMilliseconds);
            stopwatch.Start();
            for (int i = 0; i < 10000; i++)
            {
                try
                {
                    result = Convert.ToDecimal(value);
                }
                catch
                {
                    result = 0;
                    continue;
                }
            }
            stopwatch.Stop();
            Console.WriteLine(stopwatch.Elapsed.TotalMilliseconds);
            Console.ReadLine();
        }
    }
}

输出：