Hi!

Would like to use POI to create large spreadsheets, say 100 columns x 64000 
rows.
Have noticed in some simple testing, that the space the JVM takes is roughly 10 
times
the size of the resulting spreadsheet (e.g. 1.2 Gig used for a spreadsheet of 
110Meg).
Using Microsoft Office as a server uses space roughly proportional to the size 
of the
spreadsheet (e.g. 120Meg) while taking substantially longer.

Questions:
1) is there a space/time tradeoff in POI? Are there options which could reduce 
the memory
footprint while lengthening the time needed to create the spreadsheet?
2) is there an ability with POI to incrementally create the spreadsheet instead 
of having
to create the whole thing and then write it to a stream?
3) might there be another solution than POI which would take less memory for 
large spreadsheets? 
(though we much prefer the use of POI)

Thanks much for any help!
 
Dennis

Dennis Freidel
Dfreide at searshc.com
Phone: (847) 286-3214
extension 63214

IT Systems Engineer
Sears Holdings Corporation,
3333 Beverly Road, E3-266A
Hoffman Estates, IL 60179


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