Sire Penguin wrote :-

How to counteract the demon induced FPS loss

You know what, I'm no tag expert. I'll let someone who is far more familiar with tags have a stab at refining this. Even if we can't squeeze out any more performance, it definitely removes a huge bottleneck.

1. Go into your init file and change the [COMPRESSED_SAVES:YES] to [COMPRESSED_SAVES:NO]
2. Start the fort, then simply save and quit again
3. Download DF World Tinker (http://www.bay12forums.com/smf/index.php?topic=67059.0)
4. Put that in your DF folder
5. Run World Tinker. First parameter, put in "GemClod". Second, put in "export". Third, put in "file.txt"
6. A file by the name of file.txt is generated in your DF folder. This contains all the raws of the active save file, which you normally cannot change
7. Open the file, and hit Control F "demon" to find the first demon
8. If you are Pozzo, or an overseer doing this, try to do this fast or without looking! You WILL spoil demon types, their syndromes, etc. etc.
9. If using Notepad, select Edit then Replace...
10. Find What: [BUILDINGDESTROYER:2] Replace with: (leave blank)
11. Now simply hit "Replace" until it says it cannot find any more instances of the tag
12. After you're done, save file.txt and close it
13. Open World Tinker again. First parameter, "GemClod". Second, "forceimport". Third, "file.txt"
14. "go", and it'll import your modified raws

Repeat steps 9-14 with any other tag we deem beneficial. I found removing [LIKES_FIGHTING] seemed to add some performance, as my FPS rose to the 20s and then back to 16/17 when I removed it. But then it hovered around 15/16 again, so who knows.

If there is some awesome way to simply paralyze all the fuckers, or put them in an eternal slumber, or somehow shut their brains off, this would pretty much solve our woes completely. I hope some tag masters can figure that out!

Best part is this doesn't kill them or change their position. simply add the tags back, like nothing ever happened!