How to set the time flow rate in the simulator to be multiple times the real world?

We need to simulate the UAV to perform tasks many throusands of times, which takes an average of tens of seconds each time, which is quite time-consuming. Is there a way to make use of simulator’s time multiplier to speed-up the simulation clock by modifying the source code, similar to the speed-up gear in windows. For example, setting the time flow rate in the simulator is ten times that of the real world

Yes, simply modify SIM_SPEED_UP parameter to the time multiplier you want.

Thanks, yes it does work.
I am curious that what is the maximum value of this parameter?

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I think the maximum I have ever used was 10 times… but I don’t know if there is some kind of limit on it.