So I played legit for 1 hour without opening developer toolkit or running any script and registered ram usage every 5 minutes, here are the results:
[21:35] Loading game 342,4mb
[21:36] Game loaded 370mb
[21:41] 535,7mb
[21:46] 513,0mb
[21:51] 518,8mb
[21:56] 533,5mb
[22:01] 533,0mb
[22:06]...