What OS are you running?  Is the model suddenly slow or is the display/drawing slow.  I've found significant slowdowns on MacOS when running under visualization.

Sean

> On Mar 5, 2021, at 9:45 AM, 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