look at
http://www.decisionmodels.com/optspeede.htm
http://www.decisionmodels.com/optspeedd.htm

and associated pages.

Charles
______________________
Decision Models
FastExcel 2.2 Beta now available
www.DecisionModels.com

"Siva" wrote in message
...
I have a file, that is +- 200MB in size, and has +- 150 worksheets with 700
lines of formulaes in each worksheet.

Problem is that when I update the one sheet where the lookup is, it takes
about 10min to do the calculation.

I am also running a PIV 3Ghz HT with 1gig RAM.

How can I get Excel to perform faster?