How to shorten the simulation time of multiple sub-systems?

Hello dears,

I modeled three sub-systems connected together. When the simulation is running, it takes a very long time

to finish even if the set time is short (3 seconds). Is there any mechanism to shorten the simulation time span or speeding up the simulation ?

Thanks for help

Unfortunately your question is very vague- can you post a model that we can comment on? Generally there may be lots of ways to speed up a simulation, but without knowing much more information this is just conceptual.