[TEMPERATURE:NO]
my small test indicate 25% fps gain from turning off temperature in my "advanced" game.
[WEATHER:NO]
haven't noticed a difference. I didn't test it on the long run.
[ECONOMY:NO]
I don't think it's turned on anyways.
[INVADERS:NO]
[CAVEINS:NO]
Turn off the fun
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[EMBARK_RECTANGLE:2:2]
Takes getting used to for a newbie like me . I managed to get used to 3X3 . 31.19 is metal problematic so small embarks may be harder to gather desirable biomes (I could be wrong).
[POPULATION_CAP:20]
[BABY_CHILD_CAP:0:0]
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cage or kill every animal you can. all those cows, horses, and donkeys walking around generate pathfinding processes. also, bring only male cats. kill every female.
Less pathfinder is always good but it removes some the "fun" (you can always find ways to fill your graveyards). I think caging helps but due to the game dynamics I haven't figured a test for that.
atom smash as much stone as you can.
DO NOT overproduce food/drink. you can make a lot of food/drink quickly and easily if you plan ahead.
This seems to help but I'm unsure why - could it be that anyone that's searching for something has to go through the entire map's inventory or something.
do not embark anywhere with running water or magma!
I think that's correct flow isn't good for fps but I'm unsure how bad it is. I bet temperature calculation are heavier because the probably involve averaging which means division (the most processor intensive opp) and they are on a larger area than flow.
In my tests I also discovered that raw cpu speed is the main factor on how well the game run . I got a linear degradation of fps when lowering my cpu speed (it's overclocked from 2.4 to 3.3 GHz). So getting a good single thread performing CPU and pushing it to the max may be desirable
other than that I haven't tried the openGL method I'm using 2dasync which loads another core.