Why does my Simulink model take so long to run?

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Jeremy 2018-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/419835-why-does-my-simulink-model-take-so-long-to-run

回答： Kazem 2024-1-10

I am working with a large but new-to-me Simulink model in MatLab 2017A. This model takes over 26 minutes to run, which makes it very difficult to work with. I turned on the model profiler (set_param( model_name, 'Profile', 'on') before running it, and got a profile report starting with...

It is telling me that virtually all of the time is in the "compileAndLinkPhase", which makes sense with the text I see on the status bar as it runs, but it doesn't break it down any farther. Is there any setting or tool I could use to determine why this phase takes so long? Perhaps getting a specific part of the model takes too much time to compile, or a specific link takes too much time to process? Anything that tells me what it is about the model which takes so long to compile and/or link may be helpful.

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Answer 1

Sara Nadeau 2018-9-19

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编辑：Sara Nadeau 2018-9-19

Hi Jeremy!

Sounds like accelerator mode could help you. You can find details about Accelerator mode in the documentation.

This is the landing page for learning about Acceleration: https://www.mathworks.com/help/simulink/acceleration.html

And here's a topic to get you started: https://www.mathworks.com/help/simulink/ug/what-is-acceleration.html

I hope this helps!

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Sara Nadeau 2018-9-19

Additionally, more to the point of your question, I hope this list of factors that affect performance can help you identify model changes that might decrease the simulation time: https://www.mathworks.com/help/simulink/ug/speed-up-simulation.html

And there's also Fast Restart which only performs the compile stage on the first simulation you run! https://www.mathworks.com/help/simulink/ug/fast-restart-workflow.html

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