I have written several times about performance issues related to font-lock
after upgrading from 5.28. I have finally spent sometime running down the
problems that I am seeing. It turns out that it is not a font-lock problem
cc-mode 5.30 works well for me. The same cc-mode configuration using 5.30.8
(the latest production release) is _extraordinarily_ slow for all operations.
Initially I thought it was Page Up/Down which was slow and you indicated that
that might be due to font-locking as the new page is displayed. Instead, its
also operations like Home/End that are slow. When I press the End key it can
take almost 2 seconds for the cursor to move. All operations are similarly
slow. Using cc-mode 5.30 things are snappy.
When comparing the two versions I am using the exact same XEmacs
configuration settings and a similar (large) number of editing buffers.
I'd be happy to help debug this furthur if you tell me what information might
be helpful for you.
Sr. Applications Developer
Principia Partners LLC
Harborside Financial Center
1001 Plaza Two
Jersey City, NJ 07311