Re: delete time for complex geometries

From: Valeri Fine (Faine) (fine@bnl.gov)
Date: Sat Apr 01 2000 - 04:04:59 MEST


Hello Robert,
I did reproduce the time you reported and it seems to me my first guess ("garbage collection")
was a wrong one. The collection is not activated for TNode's.
I have no explanation yet.
 
  Valery

> 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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