> [ Intrigued ] ... that being?

First a fast way to read the data off disk to begin with, for start up time.
Then caching of row heights when they are calculated. Finally binary search
of row heights/positions when mapping coordinates to row indexes.

Of course depending on what calculations are truly necessary, the first draw
may still be slow, but there's really no reason a redraw should be slow
after changing one (or a few) values.

-- 
Scott Ribe
scott_r...@killerbytes.com
http://www.killerbytes.com/
(303) 722-0567 voice


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