How to check efficiency of my code?

2 次查看（过去 30 天）
Raviteja
Raviteja 2011-9-22
评论： Luna 2019-1-28
I heard, the command true is faster than logical(1) This I got after reading one answer in this answers forum.
In general how to check efficiency of my code. I usually use to compare 2 programs for the same task by using tic - toc command. Whichever gives lesser time, I use that code in my application.
Here, my question is how to check efficiency of my code in another way(s) ?

请先登录，再回答此问题。

回答（2 个）

Grzegorz Knor
Grzegorz Knor 2011-9-22
Jan
Jan 2011-9-22
The PROFILE command is almost very helpful to measure the execution time of different lines. Unfortuantely it disables the JIT-acceleration, because it can change the order of execution and a the time spent "inside a line" is not meaningful anymore. So especially the accelerated FOR loops get very slow when a PROFILE is created. This might be one reason for the old rumors about slow FOR loops.
CPUTIME measures the time with running CPU. As far as I can see, this reduces the influence of waiting for the harddisk etc. This might be helpful, or useless according to what you want to measure.
There is a nice function in the FEX to measure run-times: TIMEIT. Under Windows you can use the high-accuracy-timer also: HAT.
Finally I'm using TIC TOC also for most measurements. Repeated measurements are required, because there will be some noise.
  1 个评论
Luna
Luna 2019-1-28
I was searching about code efficiency, and found that timeit is already built-in so the function in the FEX does not exist anymore.
Putting the link here maybe it helps to someone who searches.
TIMEIT

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by