Matlab Coder: codegen command line vs gui. 100x slower. why?

Question

Mat Fan 2017-10-18

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https://ww2.mathworks.cn/matlabcentral/answers/362020-matlab-coder-codegen-command-line-vs-gui-100x-slower-why

评论： Chris Volpe 2023-8-7

Hello,

I am trying to figure out how to use go to command line and avoid the gui to generate a library (config:lib).

To do so through the gui, it takes a couple seconds.

To do so through command line: codegen('-config:lib', 'myfunction') takes several minutes.

Could anyone help me figure out the command line command used by the GUI that makes it so much faster?

thank you

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Answer 1

Darshan Ramakant Bhat 2019-9-27

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MATLAB Compiler and MATLAB Coder are two separate products having different objectives.

As you have guessed correctly, MATLAB Compiler uses MATLAB Runtime and it is like executing the packaged code in MATLAB. There may not be significant runtime performance improvements.

However, MATLAB Coder generates C/C++ code from MATLAB code. This generated code can be used to build .exe or MEX files. Using MEX you can get significant runtime improvements since the execution happens with C/C++ code. You can refer to this example for more detail

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Chris Volpe 2023-8-7

It seems to me that the staff member who answered this question didn't understand the question. @Mat Fan did not ask about the Matlab compiler. This is strictly about Coder. He/She is saying that the Matlab Coder GUI, which is a front-end to the codegen command line tool, is much faster than using the codegen command line tool directly, which is very counter-intuitive.

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