Measure performance of 2 programmes

Question

Xiaohan Du 2018-8-10

0
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https://ww2.mathworks.cn/matlabcentral/answers/414357-measure-performance-of-2-programmes

回答： Stephan 2018-8-10

Hello,

I have 2 codes codeOld and codeNew, each contains many methods (i.e. both very complex). I'd like to prove that codeNew is better than codeOld as the former is faster. So I googled it and found the following functions to measure the performance: timeit, tic toc, cputime.

I used tic toc before but people say I should use timeit. But I read in many papers, they measure the performance of a code using cputime. This is confusing me because in this help page: https://uk.mathworks.com/help/matlab/matlab_prog/measure-performance-of-your-program.html They say cputime can be misleading.

So which one should I use if I want to measure the performance and speed of my code?

Many thanks!