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Re: AS_TMPDIR in _AC_PATH_PROG_FEATURE_CHECK, $debug


From: Paul Eggert
Subject: Re: AS_TMPDIR in _AC_PATH_PROG_FEATURE_CHECK, $debug
Date: Mon, 06 Dec 2004 14:08:09 -0800
User-agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux)

Stepan Kasal <address@hidden> writes:

> "Rule 4 (for experts only): Don't optimize."

That rule makes sense in general, but here I think the performance
difference is noticeable.  _AC_OUTPUT_CONFIG_STATUS is a bottleneck on
many hosts.  Putting the temporary files in the working dir
(especially with older NFS implementations, as is common in Linux)
will slow things down quite a bit.  The feature-length test wouldn't
be quite as bad, but I suspect it was also put into /tmp for a good
reason.




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