What code is faster in MATLAB?
显示 更早的评论
What is faster in MATLAB/Simulink? The code written as .m-File or a code written in C++ and translated with MEX to MATLAB?
回答（1 个）
It depends.
A compiled C++ file is not translated to Matlab. You can call it from Matlab like an M-function, but it is a compiled dynamic library.
For a simple a*b, when a and b are large vectors, Matlab calls an optimized BLAS library, which is multithreaded. Of course you can do this from C++ also, but if you use a naive loop, you will be slower - maybe up to a factor of the number of cores in your CPU.
How do you define "faster"? If it is the time to solve a problem, you have to consider:
t_total = t_design + t_programming + t_documentation + t_debugging + t_runtime
Do not measure the runtime only. Only for real-time applications and if the runtime is some days or weeks, the other contributions can be neglected.
5 个评论
Guillaume
2018-7-2
How do you define "faster"?
Indeed!
- faster to write?
- faster to debug?
- faster to maintain?
- faster to run?
Michael Simonovski
2018-7-2
编辑：Michael Simonovski
2018-7-2
Michael Simonovski
2018-7-2
Guillaume
2018-7-2
i wanted to ask what is faster to run MATLAB - Code or MEX Code?
The first question should be: which are you proficient in? Can you write C code as well as matlab code? The simple fact that you're asking the question would indicate that you're probably not that experienced with either, in which case, the learning curve will most likely be easier in matlab.
类别
在 帮助中心 和 File Exchange 中查找有关 Call C++ from MATLAB 的更多信息
2018-7-2
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
