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0007921Dwarf FortressCreaturespublic2014-08-09 02:152014-08-09 05:37
0007921: Animals stuck behind pet impassable doors cause fps drop
Animals stuck behind pet impassable doors cause fps drop
Set a door a tightly closed for pet impassable. Assign work animal to dwarf. If the animal gets stuck behind the door trying to follow its owner it will cause a severe drop in fps. The instant you set the door back to passable the fps drop is alleviated.
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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
2014-08-09 02:15fusionpooNew Issue
2014-08-09 03:17MornieOhtarNote Added: 0028639
2014-08-09 05:37FootkerchiefRelationship addedduplicate of 0000797
2014-08-09 05:37FootkerchiefStatusnew => resolved
2014-08-09 05:37FootkerchiefResolutionopen => duplicate
2014-08-09 05:37FootkerchiefAssigned To => Footkerchief

2014-08-09 03:17   
Can confirm - seen this in my test 40.01 fortress, but didn't tried to reproduce later. In my case there was crash also, not only FPS drop. But also slight difference in the reason - it was wild animal.
In my case, I managed to close raven, that tried to attak one of my animals (or dwarves?) in my 'bump area' - part of the coridor near main entrance with fortifications on the sides and doors (planned bridges, but...) to lock it down.
The moment raven tried to leave through the locked, non-pet passable door outside the fortress, FPS dropped from 100 to 8-12, and then dwarf fortress crashed.
It happened in the 1st year spring or summer, so I had no save and abandoned fortress.

Also, though, that this might be fixed in later releases with pathfinding bugs. What DF version do you use?