You'd be more likely to get the info you requested from the OP: Russ
PS. Russ, I had forwarded your oort query to the xemacs-beta list,
eliciting this response from Matt Tucker:
Matt Tucker <tuck(a)whistlingfish.net> writes:
-- Vin Shelton <acs(a)alumni.princeton.edu> spake thusly:
> I'm likely to just switch back to 21.1.12 for right now since 21.4.6
> also has an annoying performance regression when deleting text out of
> a font-lock buffer, but I'm curious whether anyone else is seeing
> this one or if it's something peculiar to my configuration.
Is it possible to provide any further details on this? Can you generate
a -vanilla recipe for reproducing it? I haven't seen anything like this
and I'd love to get all these issues fixed.