Effect of using simout block on simulation speed?

Question

Jagmohan singh 2012-8-27

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https://ww2.mathworks.cn/matlabcentral/answers/46779-effect-of-using-simout-block-on-simulation-speed

Hello, I am using simout block in my simulink model to collect the data associated with some Signals. I can do this either by using separate simout for each signal, or by using simout block alongwith a BusCreator block where I will use Buscreator to collect data from all the signals and then simout block to collect data from BusCreator.

For me things are easier if I use different simout block from different signal. I want to know whether using too many simout blocks when one simout blocks alongwith a bus creator can be used, affects the simulation speed?

Thanks for the help............

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Answer 1

Ryan G 2012-8-27

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I wouldn't expect to much difference in simulation speed from to_workspace blocks. However, if you end up having hundreds then it may possibly slow it down. I think the more notable limitation you may see is in memory as each stored data will suck up RAM. This should not change if you use a bus or individual blocks.

You may notice a change in initialization time as well since the to_workspace blocks will have to create a new variable for each block.

The answer ultimately depends on number of signals being logged.