Hi,

I am using Applescript with Excel and have run across a performance problem when I do:

```
-- reset timestamp to start at zero by subtracting first recorded time
tell targetSheet
repeat with i from 2 to rowCount
set formula of row i of column 2 to "=A" & i & "-$A$2"
end repeat
end tell
```

In column A I have a set of timestamps which I copied from another sheet. In column B I want to reset the timestamps starting at zero time, thus subtracting $A$2 from all the timestamps in column A. This snippet works but it is real slow. I am dealing with, in this case, about 32K rows and in other spreadsheets I will have about 100K or more rows.

When I ran the above I was finally after 20 minutes forced to kill it since it had only done a few thousand cells.

When I do it by hand in Excel, I set B2 = A2-$A$2 and then copy/paste to the end of the column, it takes a 4-5 seconds, but not minutes.

Can I do a paste of the formula over the used range?

thanks.

-frank