Compiling with Matlab instead of interpreting

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Raphaël
Raphaël 2018-11-12
评论： Bruno Luong 2018-11-13
Hi,
I'm looking to compare different coding software (Matlab, Python and Labview) to know which one would be the most adept for my need. I wanted to write the same heavy calculations in the three language and see which one runs faster. I would be making a custom function and calling it a hundred times and see how long it took to execute.
To do so, I wanted to optimize my code the best I can. To my understanding, Matlab is an interpreter. He will go line by line traducting the code for the computer to execute it. I wanted to know if it was possible to compile the code in advance in a way to make it execute as fast as a compiler.
Thank you
RMT

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采纳的回答

Bruno Luong
Bruno Luong 2018-11-12
编辑：Bruno Luong 2018-11-12
MATLAB calls FFTW library behind the scene, so if you are doing heavily FFT for convolution, there is not much speed penalty.
I recently code an algorithm in C and invokes FFTW; I can attest it's pretty hard to beat MATLAB.
It hard to say anything about speed. It depends not only which "language" you select but also where as you are beginer or expert.
In MATLAB, it can play a great role.
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Raphaël
Raphaël 2018-11-13
Just making sure I studied all my options.
I'll most likelly do the calibration part of my code in Matlab since it only need to run the function once, time is far less of an issue, it's the most computation heavy and it's already written in Matlab.
Bruno Luong
Bruno Luong 2018-11-13
You need to pay attention to threading.
Labview is heavily multi-thread and MATLAB is mostly not threadsafe. That can create serious locking if you call stuff asynchronuously..

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更多回答（2 个）

Matt J
Matt J 2018-11-12
With some limitations, you can convert Matlab code to C using the Matlab Coder and compile that.
  2 个评论
Raphaël
Raphaël 2018-11-12
Do you have an idea for the limitations? I'm using fast fourrier transform and 3D convolution functions in my code.
Matt J
Matt J 2018-11-13
编辑：Matt J 2018-11-13
Here are a few relevant links.
https://www.mathworks.com/help/coder/language-supported-for-code-generation.html
https://www.mathworks.com/help/coder/ug/functions-supported-for-code-generation-alphabetical-list.html
But I agree with Bruno. It's going to be hard to beat ordinary Matlab at FFT and convolution operations, especially if you do those computations on the GPU using the Parallel Computing Toolbox.

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Image Analyst
Image Analyst 2018-11-12
  1 个评论
Bruno Luong
Bruno Luong 2018-11-12
MATLAB compiler actually doesn't compile anything. It just encrypt/package the source code to run under the runtime.
In this perspective, the speed gain is 0.

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