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Simcenter Amesim Best Practices > How do I speed up my simulation

Run statistics

The RSTAT submodel in the Simulation library gives a lot of numerical information on the run. It is particularly useful when the simulation spends a huge amount of CPU time on specific events of the model (please refer to the submodel documentation for more details).

Figure 492: Run stats

  • Integration step: if it gets too small, it means that your model is difficult to integrate. This value can indicate the link between specific events (valve closing for instance) and drastic slow down of the simulation.

  • Discontinuities: shows when you get discontinuities.

  • Adams steps or BDF steps.

Figure 493: Run statistics

Figure 494: Runstats plot

Source: https://docs.sw.siemens.com/en-US/doc/254352342/PL20250521841123434.amesim_collection.Reference/Run_statistics · retrieved 2026-07-17