Dwarf Fortress Bug Tracker - Dwarf Fortress
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0001462Dwarf FortressDwarf Mode -- Flowspublic2010-04-23 12:162011-03-30 13:37
Kefka 
Footkerchief 
normalmajorhave not tried
resolvedduplicate 
DesktopWindows XPSP 2
0.31.03 
 
0001462: Ice thawing triggers massive lag
So far had this happen only once, might be a stroke of bad luck. Anyway, I had a fort with a large (artificial) body of water that was being filled from the nearby brook. Winter came in and froze the partially-filled lake. Many tiles were just 2/7 or even 1/7 so I expected extra water when thawing happened. However when summer came and the ice thawed, the game froze for a few seconds and then resumed with uncommonly massive lag. My FPS was down from 80 to probably 30 or even less.
I don't know if all the sudden extra water might be to blame, and saving/reloading doesn't seem to make the lag go away.
A detail is that the lake had ramps on its sides, which seem to have been deleted by the buggy ice. I don't know if that might be related.
Have a partially filled lake with ramps on the sides freeze and thaw.
ice
duplicate of 0001899resolved Toady One Game locks up for 30 min during seasonal temperature shift 
Issue History
2010-04-23 12:16KefkaNew Issue
2010-04-23 12:24FootkerchiefNote Added: 0004753
2010-04-23 12:24FootkerchiefNote Edited: 0004753bug_revision_view_page.php?bugnote_id=0004753#r1631
2010-04-23 15:52LacTag Attached: ice
2010-04-26 16:17king doomNote Added: 0005200
2011-03-30 13:37FootkerchiefRelationship addedduplicate of 0001899
2011-03-30 13:37FootkerchiefStatusnew => resolved
2011-03-30 13:37FootkerchiefResolutionopen => duplicate
2011-03-30 13:37FootkerchiefAssigned To => Footkerchief

Notes
(0004753)
Footkerchief   
2010-04-23 12:24   
Do you still have the laggy save? If so, it would be helpful to upload it to http://dffd.wimbli.com/ [^]

Are you getting any pathfinding problems?

(0005200)
king doom   
2010-04-26 16:17   
I've had several forts where rivers freeze in winter, there is a noticable lock when they thaw as the game calculates water. The ramps thing I actually just submitted a report about, freezing sems to detach them from one z level. In my case it was at the top.