Dwarf Fortress Bug Tracker - Dwarf Fortress
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0009689Dwarf FortressGeneralpublic2016-04-12 01:282016-04-13 13:08
Knight Otu 
normalmajorhave not tried
0009689: Game at Unplayable Speed
Playing the game as normal and suddenly the frame-rate dropped below 1 FPS.

I don't have any explanation for it but I have a save file.
http://dffd.bay12games.com/file.php?id=11939 [^]
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duplicate of 0000797confirmed Footkerchief Animals/pets repeatedly try to find path through pet-locked/"tightly closed" doors, causing lag 
Issue History
2016-04-12 01:28lightmanNew Issue
2016-04-12 05:23Knight OtuNote Added: 0034998
2016-04-12 05:23Knight OtuAssigned To => Knight Otu
2016-04-12 05:23Knight OtuStatusnew => needs feedback
2016-04-12 16:18lightmanNote Added: 0034999
2016-04-12 16:18lightmanStatusneeds feedback => assigned
2016-04-12 16:26lightmanNote Added: 0035000
2016-04-13 13:08Knight OtuNote Added: 0035008
2016-04-13 13:08Knight OtuRelationship addedduplicate of 0000797
2016-04-13 13:08Knight OtuStatusassigned => resolved
2016-04-13 13:08Knight OtuResolutionopen => duplicate

Knight Otu   
2016-04-12 05:23   
There are at least two animals trying to path through pet-locked doors/hatches (0000797) - a calf just north of your temple, and a giant bat way down the shaft. Does getting rid of the pet-locking and/or the animals improve your FPS?
2016-04-12 16:18   
I can try that out. It's weird because I don't think I changed the state of the hatches when the FPS drop occured. This actually isn't my fort but one that I was investigating for someone when the issue appeared.
2016-04-12 16:26   
Okay, so switching the hatches to "pet passable" brought the FPS to normal. It's surprising that it really crushed the framerate like that. There must have been some animal that wasn't pathing and then happened to decide to go somewhere.

Thanks for your help! Maybe this save will help in some way, if this issue still needs investigating.
Knight Otu   
2016-04-13 13:08   
Thanks for the update. I'll mark this as a duplicate, then, and post the link in the other issue.