Mac: I’ve seen that before when a new Java patch has been installed. We’re there any updates to the system? Regards, Robert Zupko > On Mar 5, 2021, at 09:46, Mac Sarmady <[log in to unmask]> wrote: > > Hello > > I am using Java 11 to run mason simulations. A few weeks ago my simulations were reasonably fast (crowd simulation with a few hundreds agents). > > Then I had a pause and when I ran the simulations a few weeks later they are extremely slow (perhaps between 4 to 10 times?) > > - Has anyone encountered such a thing on his/her JVM and simulations? > > - Is there a benchmark on any of the mason examples that I can test and see whether the problem is from the installation or something inside my own code (I don't remember changing it in the period)? > > Regards, > Mac