I actually runned it many many times with the same (or very similar) ammount of rows and it takes less than 300 seconds to complete, why the limit is set to 600.
Also, PHP timeouts use to appear in my logs, but in this case they did not.
However, this seems to be fixed. I don’t know how, maybe some browser cache related issue, I don’t really know.
Anyway, I am making this thread as resolved. Thank you.
