Matlab processing very slow, but APP previously created with app design still fast

Hello!

Few weeks ago, I created a matlab standalone with the matlab app designer: the app runs very fast on very huge dataset of data.

Last week, I noticed that if I run the same code from the app designer, it is not as fast as it used to be! My collegue has been using my app (standalone) since June and it is very fast, but on my laptop it seems something is not right (code running is 5 times slower than the app).

Is it possible any matlab updates could have cause it? Maybe updates on the runtime? What should I test?

Thank you in advance