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From: Thien-Thi Nguyen <ttn@glug.org>
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Subject: Re: Processus delay
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Vincent Barichard <vincent.barichard@info.univ-angers.fr> writes:

> Is anybody has an idea ??

you can study the system behavior by wrapping the subprocess w/
a script that saves the time when its child actually finishes.
then compare that time to the time reported by emacs.  if these
differ by 2sec (as observed from macroscopic scale), that means
it is slow sentinel dispatch (but why we still don't know), as
you hypothesized.

thi