Hi Anis, maybe someone else will be able to test it on their machine and see if it also takes them such a long time.

But it seems strange that my old system finishes it 10 times faster than yours...

The booleans are a very CPU intensive calculation, so if you have other programs running in the background also taking a lot of CPU time, that could slow them down quite a bit. That's the main thing I would look for at first anyway.

- Michael