From what I saw in streams and in my own games - baseline is around 25 seconds for a month on normal speed at the very start of the game, twice that on fast, and again twice on fastest. So 25-12-6, in this area, give or take a few seconds, usually give, I don't think game could run faster then 5 seconds per month on fastest. But that's the very beginning.Anyone knows or can say what the official statement is on how fast the speed settings should reflect in in-game days / months per second?
Is there a list of possible actions I can take to improve the performance from my end?
As for what you can do - well, you could buy a new game on Christmas sales to play while devs fix performance. That's not a rude answer - that's what I've been doing. Devs acknowledged the problem, they are working on it. If we are lucky, we would see patch with performance fixed in January. If we a less lucky - in February. If our luck is comparable to Bethesda studious nowadays - around summer. I personally think that AI and performance would be more or less fixed by mid-February. But then again, I was totally convinced 2.2 update would be released in February. Now I wish they would've delayed release..