A small followup on my earlier message. Actually my macro doesn't take _hours_ to delete the geometry it only takes: destroy geometry Real time 0:31:59, CP time 1919.090 done destruction 32 minutes. Though it did _used_ to take hours but I restructured things so that all the 484x192 strips weren't in the top level node but were more hierarchical (192 strips inside each of 484 planes). Valeri Fine suggested that this behavour could be due to garbage collection during the deletion of the shape's THashList and node's TList (hierarchy). Is there some way to flag a TList (and derivatives) turn this garbage collection activity off? A quick glance at TList (and ancestors) didn't seem to turn up anything. I also didn't see what exactly triggers the garbage collection -- guess I have to study the code carefully to find that out. -robert
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