I have written a VBA program that extracts data from a number of small (80K) Excel worksheets. The problem that I am having is with the I/O on these worksheets. Using Excel 2010, I am able to average processing of 3.7 worksheets per second, but when I run
the same program on the same computer and the same database using Excel 2013, the the throughput drops to 1.5 worksheets per second.
The slowdown does not seem to be processor related as in a separate test program with no I/O run on the same computer, Excel 2013 is about 15% more efficient than Excel 2010. I suspect that the actual problem is not the I/O time itself, but instead the time
that it is taking to display the retrieved workbook that is slowing down the process.
Do you have any ideas on what is causing this slowdown in Excel 2013 and what I can do to speed things up?
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Slow I/O using Excel 2013
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