Is it possible to reduce code generation time for simulink Matlab function block?

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Pouya Jamali
Pouya Jamali 2012-12-22
We know that when there is a Matlab Function Block in Simulink block diagram compilation phase take time more than usual because of mex file generation process. But it happens just one time after editing the function. This advantage is really good because it saves a lot of time. But when I use sim command to run my Simulink system within a script m-file in an iteration loop, in spite of any change to Matlab Function Block content, mex generation happens in each iteration which cause a huge increase in running time. Is there any way to force Matlab Function Block to use pre-generated mex file in each iteration in order to reduce spare time? I hope you understand what I mean.

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Azzi Abdelmalek
Azzi Abdelmalek 2012-12-22
Instead of Matlab Fcn block use interpreted Matlab Fcn block.

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Fred Smith
Fred Smith 2012-12-26
As you describe the situation this sounds like a bug. If you are changing non-tunable parameters for your different runs the behavior is expected. Otherwise multiple runs should not generate code. This is heavily tested functionality so there must be something special about your model.
Please contact MathWorks support with reproduction steps; and we'll look into it.
Thanks,
Fred

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