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Causes of Slow Processing Excel VBA Programs

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Last Modified: 2012-06-27
I am executing Excel 2007 VBA programs on a DELL OPTIPLEX 760 with 3.2 gig and a Dual Core processor.  The programs are processor intensive. Actual functions that are called frequently in the execution of the programs are cuts and pastes, sorts, finds, and VLOOKUP.  The worksheets are loaded data from several large files, and the size of the workbook is around 92Mb. To avoid overhead, the display function is turned off as much as possible.

After some time of execution, the performance becomes very sluggish.  I try saving the workbook, and closing Excel, and I then restart the program where it left off, but the performance is still poor.

Restarting the computer does help, but I would like to understand what is causing the poor performance so that I can aleviate the issues such that I can keep the programs working at optimal speed.
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