R1 robbie probably knows this is his post taken from this
thread.
with the couple of posts i have in this thread about v1.15 introducing stutters (even when FPS show 60+) and FPS drops compared to the v1.10 on the same PC, same HDD, using same settings etc. i had tried all the suggested fixes in this thread to no success, and this evening i was swapping back and forward between versions comparing the FPS drops and stuttering and just generally trying to figure it out seeing as all settings were identical. i was testing at Taruma and a rFactor conversion track (Jerez, which has really high FPS) etc..... then i noticed my v1.10 had time scaled set to NONE whereas v1.15 was set to NORMAL
(maybe by default??). so i changed that to NONE in v1.15 and tried a couple of the same tracks i had been testing and voila!! the two tracks i looked at so far had their FPS back up and no stuttering present whatsoever.... I am going to test a few more and will post my outcome.
Turning the time scale to none sorted my problem out.