bug#64735: 29.0.92; find invocations are ~15x slower because of ignores

[Eli Zaretskii]

> Date: Sun, 23 Jul 2023 20:58:24 +0300
> Cc: luangruo@yahoo.com, sbaugh@janestreet.com, yantar92@posteo.net,
>  64735@debbugs.gnu.org
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> A possible advantage of doing it earlier, is that if filtering happens 
> in C code you could do it before allocating Lisp strings

That's not what happens today.  And it isn't easy to do what you
suggest, since the file names we get from the C APIs need to be
decoded, and that is awkward at best with C strings.