测量Matlab中的CPU时间使用量(以毫秒为单位) [英] Measure CPU time usage in Matlab (in milliseconds)

问题描述

如何测量Matlab在执行某些命令时所花费的时间?我正在寻找类似linux time命令的命令，该命令返回实际使用的CPU(用户+ sys)，而不是所转移的总时间，该时间可能会因其他进程的系统使用情况而有所不同.

How can I measure the time used by Matlab in the execution of some commands? I am looking for something like linux time command, which returns the actual CPU used (user + sys), instead of the total time transcurred, which can vary depending on system usage by other processes.

此外，时间应该以毫秒为单位.

Also, the time should be returned in milliseconds.

推荐答案

您可以使用

You can use cputime:

CPUTIME CPU时间(以秒为单位). CPUTIME返回已使用的CPU时间(以秒为单位) 自MATLAB启动以来，通过MATLAB流程进行的处理.

CPUTIME CPU time in seconds. CPUTIME returns the CPU time in seconds that has been used by the MATLAB process since MATLAB started.

例如:

   t=cputime; your_operation; cputime-t

返回用于运行your_operation的cpu时间.

returns the cpu time used to run your_operation.

返回值可能会溢出内部表示 并环绕.

The return value may overflow the internal representation and wrap around.

还有 timeit .

您还可以使用tic/toc(请参阅 Daniel的答案).

And you can also use tic/ toc (see Daniel's answer).

请参见一些有用的评论关于测量CPU时间.根据上面的链接，与cputime相比，tic/toc和timeit给出的估算值更准确.

See some useful comments on measuring CPU time. According to the above link, tic / toc and timeit give more accurate estimations than cputime.

这篇关于测量Matlab中的CPU时间使用量(以毫秒为单位)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！