@Bruno Luong Really? Unreasonable! How can the combination of .* and conj faster than a single ./ ? Does that mean MATLAB Interpreter does a terrible optimization dealing with ./ ?

Tmfu Vh 2019-7-14

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471614-exp-1i-angle-x-angle-y-x-abs-y-abs-x-y-which-one-is-better#comment_724265

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471614-exp-1i-angle-x-angle-y-x-abs-y-abs-x-y-which-one-is-better#comment_724265

编辑：Tmfu Vh 2019-7-14

@Bruno Luong By the way why don't you give your comment as an answer so I can accept it?

Bruno Luong 2019-7-14

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471614-exp-1i-angle-x-angle-y-x-abs-y-abs-x-y-which-one-is-better#comment_724267

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471614-exp-1i-angle-x-angle-y-x-abs-y-abs-x-y-which-one-is-better#comment_724267

编辑：Bruno Luong 2019-7-14

On the processor (old or modern), multiplication operation is serval time faster than division, and conj requires one bit inversion with is pretty fast. This has nothing to do with MATLAB but unitary cost of arithmetic operations.

The angle() is the worse since it requires calling trigonometric function.

Tmfu Vh 2019-7-14