slow ispell.el in 23.3 on Mac

[Alley Stoughton]

When running ispell.el in the GUI-version of GNU Emacs 23.3 on Mac OS
X

  GNU Emacs 23.3.1 (x86_64-apple-darwin, NS apple-appkit-1038.35) of
  2011-03-09 on black.porkrind.org,

spell checking a buffer using ispell is extremely slow.

In contrast:

(1) running ispell from the shell is very fast;

(2) running ispell via ispell.el in the non-GUI GNU Emacs 22.1 that
is available as /usr/bin/emacs on the Mac

  GNU Emacs 22.1.1 (mac-apple-darwin) of 2011-06-24 on doublemagnum.apple.com

is also very fast.

In FAQs and mailing lists, I can't find any recent mention of this
problem.  Any suggestions about what is going on or whether there
is a workaround would be very appreciated!

Alley