FW4与FW 3.5中DateTime.TryParseExact的性能问题

本文介绍了FW4与FW 3.5中DateTime.TryParseExact的性能问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

大家好

我遇到了fw3.5和4之间的一个有趣的性能问题

I comeacross aninteresting performance issue between fw3.5 and 4

当我在fw 4上运行此代码时，运行时间为8.39秒，但是在fw3.5上运行时，时间为0.34秒

when i run this code on fw 4 the running time is 8.39 sec but when running it on fw3.5 the time is 0.34 sec

Stopwatch stopWatch = new Stopwatch(); string formats = "%M/%d/yyyy %h:mm:%s:fff tt"; DateTime datetime = DateTime.Now; stopWatch.Start(); for (int i = 0; i < 10000; i++) { DateTime dateTime; bool isParsed = DateTime.TryParseExact( DateTime.Now.ToString(), formats, new CultureInfo("en-US"), DateTimeStyles.None, out dateTime); } stopWatch.Stop(); TimeSpan ts = stopWatch.Elapsed; string elapsedTime = String.Format("{0:00}:{1:00}.{2:00}", ts.Minutes, ts.Seconds, ts.Milliseconds / 10); Console.WriteLine("RunTime " + elapsedTime);

推荐答案

感兴趣...我检查了它. CultureInfo的实现方式有所不同:

Interessting... I checked it. CultureInfo is differently implemented:

1.)它在4.0中具有属性:

1.) It has a attribute in 4.0:

[SecuritySafeCritical, TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")] Whatever that means..