I would like to know if you have tried to run a gigantic number of tests on the app.
I was wondering if running 5,000 or 10,000 tests on the same computer would cause any negative impact on the performance or the system.
Most probably your pc will die soon before you reach the ‘gigantic’ number. Read a bit about jvm …
On the other side, feel free to try and keep us posted 
@jaime.delgado I would advice you to separate the number of test into smaller ones and run on different VM’s . You would need a machine with lots of RAM power and hard disk space to run this big number of test if you don’t break it down to smaller components.
This should really only matter if you are running all or some subset of those tests in parallel. If running sequentially, you should theoretically be able to run everything from the same machine (although it might take a while).