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Subject: Re: extreme cpu usage with nndir (on specific files)
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One way to find out what the heck Emacs is doing is to M-x
toggle-debug-on-quit RET, then hit C-g when it takes the long time.
Do this several times, and you might get an idea what takes so long.

Hm.

Or maybe M-x elp-instrument-package RET nndir RET?  Anybody out there
who groks elp?
kai
-- 
I like BOTH kinds of music.