Date: Mon, 01 Oct 2001 17:37:42 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: sandmann AT clio DOT rice DOT edu
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In-reply-to: <10110011332.AA14984@clio.rice.edu> (sandmann@clio.rice.edu)
Subject: Re: mntent problem summary on Win2K/XP
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> From: sandmann AT clio DOT rice DOT edu (Charles Sandmann)
> Date: Mon, 1 Oct 2001 08:32:17 -0500 (CDT)
> 
> The set of lfn=n fixed the problem, so we don't have to make a hard
> decision here.  Next question - is it worth the effort to skip the
> putenv calls and replace the current findfirst loop with direct call
> to the DTA call followed by potentially looping the 4e interrupt?
> 
> As slow as getmntent currently is searching for missing floppies and
> network drives, I didn't think it would make much difference.

Using putenv slows down many system calls, since it disables the
optimization in _use_lfn that depends on environment being unchanged
for using the cached value.

It is not so important in mntent, except for the next system call, but
I think we should discourage that in the library in general.

Obviously, not a grave issue in this case, though.