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Matlab Simulink RepMat Execution Time

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Yusuf Selim KARATAS
Yusuf Selim KARATAS on 1 Dec 2020
Answered: Walter Roberson on 1 Dec 2020
Dear All,
I need a significant help.
I have a Simulink model that has a subsystem that takes a matris [3x1] and makes it [3x11] by just adding them side by side. Normally we were doing that with vector concatenate and it takes nearly 1 ms. With time optimization processes, we decreased that to 0.95 ms but that is too much for us. We need to decrease that value at least half of 1 ms.
My function is basically a repmat. And it takes nearly 0.95 ms on the hardware.
Since operation is not complex at all, we believe that there should be a less time-consuming way.
Any help will be appreciated.
Thanks.
  1 Comment
Ameer Hamza
Ameer Hamza on 1 Dec 2020
Have you inspected the generated code? That might give some hints on why it is taking too long.

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Answers (1)

Walter Roberson
Walter Roberson on 1 Dec 2020
persistent idx11
if isempty(idx11)
idx11 = ones(1,11);
end
y = u(:, idx11) ;

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