Slow performance on Snow Leopard

[Pat McMillan]

Microsoft is aware of sporadic reports of serious performance degradation in
Excel 12.2.1 running on Snow Leopard and is currently investigating. It
appears that the problem is related to specific printer drivers on Snow
Leopard when Excel is in Page Layout View and that a temporary workaround to
the problem is to switch to Normal view (View/Normal). While we investigate
this problem, we will continue to monitor this forum for more information
that might help us in our investigations.

Thank you,

Pat

 

[J_Sewell]

I have also been having this problem, and also traced it back to being an issue with HP printer drivers (I'm using an A4 print size). If a printer using the HP driver is set as the default printer under System Preferences/Print & Fax, then the slowdowns occur. If you select a printer using a non-HP driver as the system default, no slowdowns occur.

I have outlined the various steps I took to find this in this thread on the Apple discussions site, including an instruments trace that shows the CUPs calls during the slowdowns. The message below links to the useful posts

<http://discussions.apple.com/thread.jspa?messageID=10308110#10308110>

Other users have since confirmed the HP driver involvement. Hopefully this extra info will lead to a fix,
J