Hello all - The Excel development team is currently investigating a number
of scenarios where VBA macros take longer to run in Excel 2007 than in
earlier versions (i.e. Excel 2003).

I am looking for folks who believe they have run into a VBA performance
slowdown and who would be willing to share their code/workbook/steps to
reproduce the issue. Given the enormous variety of solutions people build
in Excel using VBA, we feel it is important to survey the XL community to
collect a range of examples that are important to XL users.

Specifically, we are looking for VBA code that takes longer to run in Excel
2007 than in previous versions of Excel. Other than that, pretty much
anything goes with respect to feature & code usage. To successfully analyze
any problem, we really need to be able to run the code & reproduce the
problem in-house, so the more specific and helpful the comment, the better.
General comments about something slowing down, without the example code that
demonstrates the issue, can prove difficult to isolate and analyze.

A couple notes:
-- Don't forget to send us the workbook as well, if it contains data or a
certain structure required by your code (for example, if your code assumes
particular sheet names).
-- If you can't send us the whole solution, or if you need to simplify the
code at all, please keep in mind that those changes can end up altering
where the performance bottle neck occurs, create new bottle necks, etc. In
these cases it would be really helpful to also send us:
- a description of what the original code is doing,
- what sort of slowdown you are seeing on your target systems

.... this simply helps us reproduce your results in-house.

We have already taken a look on the web for reported issues and followed up
with some folks, but if you've already posted comments publicly, it wouldn't
hurt for you to let us know those links just to be sure we've covered those.
Anything submitted will be treated as 100% confidential and used only for
our own internal performance testing.

Folks can either reply to this post with an attachment & description, or
send files and descriptions to: . If emailing files
will not work, contact me and we can make other arrangements. Once we have
the code / solutions, we will baseline their performance in earlier versions
of Excel and then run it on a set of test machines using the version of
Excel that's currently under development, and compare the results. Thanks
in advance to anyone that sends in examples.

Sincerely,

Chad Rothschiller
Excel Program Manager