Hi Pablo,
I have the same problem, my project generation take 46 minutes, in order to speed up generation you need ram and you can have it changing WR configuration: on my PC I have 8G of ram and i have dedicated 5G to webratio.
These are my ram parameter inside webratio.ini file:
-Xms40m
-Xmx5g
-XX:PermSize=64m
-XX:MaxPermSize=1g
Now i'm working on windows, but years ago I had a linux machine, in linux environment my performance was great compared my "windows" collegue ( 60% of generation time)
I hope this will help you
Bye
Giulio