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From: Kai Grossjohann <kai@emptydomain.de>
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Subject: Re: JDE/ECB super slow and I don't know what I'm doing... :-(
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cda@milhouse.sgiscpq.com (C. Armour) writes:

> How could a person track down what is causing the CPU to spike 
> every time I make a minor edit?  When I find out what it is,
> then I can disable it.

Maybe the elp package is useful.  You could M-x elp-instrument-package
RET (or somesuch), then do what takes time, then M-x elp-results RET
(or similar).

Kai