Re: file-equal-p

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Thu, 16 Feb 2023 17:59:15 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Po Lu <luangruo@yahoo.com>
> >> Cc: emacs-devel@gnu.org
> >> Date: Thu, 16 Feb 2023 16:43:25 +0800
> >> 
> >> Eli Zaretskii <eliz@gnu.org> writes:
> >> 
> >> > Fix Haiku?  A 'stat' call accesses the directory and file's meta-data,
> >> > not the file itself, so what Haiku does makes no sense, IMO.
> >> >
> >> > But if you cannot fix Haiku, a suitable haiku-only change in
> >> > file-equal-p, whereby the access times are exempt from comparison, is
> >> > a possibility.
> >> 
> >> Something like this?
> >
> > I'd prefer to have the original full comparison done first, and only
> > if it fails, do the tailored comparison only for Haiku.  That's
> > because most systems don't need this, and so testing the condition in
> > all cases will slow down those other systems.
> 
> But here, the test is only done at all when (eq system-type 'haiku).

It is still one more test, done for everyone.