Re: 23.0.60; Can't start emacs when filename contains national character

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Sat, 29 Mar 2008 16:22:53 -0400
> Cc: lekktu@gmail.com, lennart.borgman@gmail.com, svenjoac@gmx.de,
> 	emacs-pretest-bug@gnu.org
> 
> > That's what I did eventually.  I tried to be smart at first, to maybe
> > avoid the overhead of full-fledged decoding, but gave up and used
> > DECODE_FILE instead.
> 
> If the issue is performance, maybe we should just improve
> (en|de)code-coding-string to recognize those few special cases and
> redirect them to string-(to|as)-(uni|multi)byte.

I'm not sure it's warranted: we do something like

    if (STRING_MULTIBYTE (foo))
      foo = ENCODE_FILE (foo);

in quite a few more places, so it's probably efficient enough.  It's
just that en/decode_coding is so scarily large, while string-to/make-*
are so seductively compact and simple...