It will depend on the other running tasks that are occupying the CPU at that
time.
Any virus scan, back up, network stuff going on?
What about file Indexing ?

If you slow/fast Excel setups are the same, look at what the OS is doing ?

NickHK

"SlipSleepy" wrote in message
...
I have a macro running in the background of Excel. For a while, it was
running very fast. Then, w/o changing anything (that I can figure out, at
least), it started running at about 5% of the former speed. Then, again
w/o
making any real changes, it started running more quickly. I was thrilled
for
a day, and now it is back to its bad habits. Any thoughts? Is there a
compiler in the background that I am unknowingly turning off/on?

Thanks in advance