测量亚毫秒级延迟的最精确方法 [英] Most precise way to measure sub-ms delays

问题描述

测量代码执行中亚毫秒级延迟的最精确方法是什么? (VS2010，Win32)

What is the most precise way to measure sub-millisecond delays in code execution? (VS2010,Win32)

谢谢

 

推荐答案

这是一本好书:http://software.intel.com/zh-cn/articles /measure-code-sections-using-enhanced-timer/

This is a good read: http://software.intel.com/en-us/articles/measure-code-sections-using-the-enhanced-timer/

，也 这是有关如何使用QueryPerformanceCounter()的示例.

and also  here is a sample on how to use QueryPerformanceCounter().

http://support.microsoft.com/kb/172338

http://support.microsoft.com/kb/172338

您会注意到上面的示例具有以下信息:

You'll notice that the sample above has this info:

QueryPerformanceCounter最低分辨率:1/1193182秒
API开销:1.92761875388667E-05秒

QueryPerformanceCounter minimum resolution: 1/1193182 sec
API Overhead: 1.92761875388667E-05 seconds

-Seetharam

-Seetharam

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