v0.31 Talk:Maximizing framerate

World Gen editing to speed Fortress Mode

On an old slow computer, I have found that editing the world_gen.txt file in the date/init folder to help:

[CAVERN_LAYER_COUNT:3] - reduce for fewer cavern layers, so less fun, but more speed.
[CAVERN_LAYER_OPENNESS_MIN:0]
[CAVERN_LAYER_OPENNESS_MAX:20] not entirely sure what these do, but these were the figures when I stopped testing.
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:0] restricts the density of passages, at these figures the caves are not filled with tiny passages

Since I haven't tested exhaustively I don't feel this should be on the front page yet. - JimiD

More World Gen editing to speed Fortress Mode

I did some similar testing but instead of changing the number of cavern layers I changed the size of the caverns themselves. The defaults are Minimum Natural Cave Size 5, Maximum Natural Cave Size 25. I lowered these to 4 and 12 and ended up with a map with less than 40 z levels below ground. This significantly improved performance, load and save time without sacrificing the cave features. In fact it's a little funner since I don't have to travel so far to get to magma. Currently I'm running close to 50 dwarves and I'm noticing almost no hiccups or drop in frame rate(from 100).

I have only tested this on one map and each cavern layer has exactly 5 z levels each which is odd. More testing needs to be done to get exact figures but it does seem to be an excellent alternative to lowering the number of caves or the size of embark. Using this method, increasing the embark size isn't out of the question.

I tested this map on my 1.6GHZ EeePC Netbook and got a reliable framerate of 34, which is quite playable. - Lemunde

maybe you are confusing rare natural caves (familiar from 40d version, home to megabeasts, see worldgen-exported sites_and_pops.txt) with the new Cavern Layers which are guaranteed under every embark area. (.31.12) --TomiTapio 00:49, 26 July 2010 (UTC)

Importance of Speedup

I think this is a really important feature which should have a high priority. Maybe this page can get some special attention on the front page along with other pages with high priority? A lot of people just don't play anymore with all of the graphics problems in this version, which is sad.

Another possibility here is for an explanation of the various init.txt settings, they can really change a LOT in your performance. - Nether

try a 3x2 embark. --TomiTapio 00:49, 26 July 2010 (UTC)

Obsolete for the current version in italic

I have changed the parts where it is explained that the action is obsolete for the current version into italic font. I believe that this is a minor change which makes the page a lot easier to read. - Nether

How true is any of this?

I've applied the various recommendations given here and noticed absolutely no speedup. Getting rid of thousands of items by atom smashing or gifting to merchants? Nothing. Caging and uncaging fifty animals? Nothing. Blocking off the outside, or the cavern levels, with a locked door, a bridge, a floodgate, a channel? Nothing. Turning off my indoor waterfall was the only thing that seemed to help, getting me about 8FPS extra, from 25 to 33FPS with 105 dorfs. GhostDwemer 20:34, 10 November 2010 (UTC)

PRINT_MODE: TEXT

Changing PRINT_MODE to TEXT increases my framerate to max (linux). Certain keypresses are however not noticed in terminal, such as shift + arrow key as well as the function keys. --Questionmark 21:03, 27 November 2010 (UTC)

PRINT_MODE: TEXT (vs 2D) made zero difference for me on Linux (Ubuntu 10.04) 202.156.10.234 13:08, 14 December 2010 (UTC)

Success Stories

Losing is Template:L! But there's nothing fun about abandoning your fortress because the framerate has dropped to 6. For many, more fortresses are lost to FPS death than anything else, and improving framerate remains a something of a mystery. If you find something that works, please share it here.

From 40fps to 140fps

pc: 2.2ghz 1.5gb ram. fortress: 2x2 embark, 40-50 dwarves, 130 animals. temp & weather off. 1 cavern

This fort ran at 150fps for a while but gradually after 11 years slowed to 27. At this point I've focused my efforts exclusively on maximizing framerate, trying the usual tricks:

• Atom-smashing: no help AT ALL.
• Animal slaughtering / caging: gained 10-15fps for killing about 50 animals.
• Then I notice that my dwarves are FILTHY! Some having over 10+ pages of various blood and pus spatterings in their inventories.

I dig a crude bath, which consists of a hallway which dips down into a brief channel and back up before hitting a dead end. I designate a Pond zone over the channel and the dwarves waste no time in drawing a bath (1/7 deep). After designating a burrow on the other side of the bath, I order the entire fortress to it via the Alerts screen (restricting them to that burrow). Immediately upon crossing the channel my framerate went from ~40 to ~140 and it is decided the fortress will live on!

Conclusion: The amount of items on the map and pathfinding were very minor causes of slowdown in my case. The increases gained from slaughtering animals may well have been from their contaminants being destroyed in the process rather than the pathing they were calculating. Above all, the contaminants were the cause of this fortresses near-demise. --Uninvited Guest 07:27, 1 December 2010 (UTC)

From 11fps to 24fps

pc: 2.1ghz 2gb ram. fortress: 2x2 embark (i think), 110 dwarves, 100 animals.

As this was my first playthough, I didnt noticed any strange (only that the game was designed to be a bit too low) until I read somewhere about the framerate problems, so I activated mine to show them and saw i was at 11 fps!

I found this guide, and followed the previous case example, I skipped killing animals, or smashing objects, and when straight for the dwarf-wash.

I downloaded DFHacks (http://www.bay12forums.com/smf/index.php?topic=58809) and made some 7 high water blocks on some chocke points. After unpausing, the whole place was full of mud and blood, so used the dfcleanmap on the same utility pack to make then dissapear.

My FPS went straight to 24 fps; Basically I now see everything x2 the speed i was used to see!

BTW, be carefull with this method, I killed 3 dogs by accident as they smashed on other objects (tidal force I guess) and the 3 of them were pets of my main warrior, who is very angry now! I fear a lot of fun is comming xD

Conclusion: I did not tried any of the other methods, so I cant say they dont work, but I can say, that the filthiness of the dwarf population have a HUGE impact on FPS. Krelian

Running water

Nice work by DeMatt in tidying up this page.

Is there any reason running water isn't mentioned? I was under the impression brooks and rivers were big FPS killers, at least in previous versions. Perhaps a sentence about having an off switch for any mist generators, too?

Bognor 14:39, 4 January 2011 (UTC)