I love me some 5x3 embark areas; but as soon as I really cut into the bedrock; I quickly drop from 100/50 FPS to 25/15 FPS (exaggeration alert!). In fact, the most common cause of fortress abandonment for me isn't Goblin Sieges, it isn't lava-related Fun, it's not tantrum spirals, it's terrible lag, even when running a population cap of 20.

From what I hear; it's more or less accepted that in the current version, the main culprit is mining and loose stone; and even turning all of the stone into constructions doesn't seem to help much.

Then again; building a playable fortress while staying squarely inside the three or four levels of soil on a "very deep soil" embark seems very undwarvely…

So how can I undertake massive digging projects and avoid terribletastic lag?

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    Atom-smash the stone, don't just use it to build constructions. Remove it from the stocks screen entirely. – Raven Dreamer Jul 3 '11 at 0:41
  • I don't think there's a whole lot you can do actually. Dwarf Fortress is inherently slow after a while. If the stone doesn't make you slow, something else will. – C. Ross Jul 3 '11 at 12:45

This may be well known (it's mentioned in the wiki), but turning off the temperature and weather features hugely increased my framerate. Edit data\init\d_init.txt, find these lines:


and change them to this:

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    And additionally, make sure you don't have running water, whether that's due to cavern shenanigans, or worse. – Raven Dreamer Jul 14 '11 at 19:31
  • That includes ocean/sea side embark sites, not just rivers! Waves/Tides will wreak havoc upon your FPS. – chandsie Jul 14 '11 at 23:48

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