On Sat, 5 Apr 2025, 17:45 Eli Zaretskii, <eliz@gnu.org> wrote:

> > From: Gergely Riskó <gergely.risko@gmail.com>
> > Date: Sat, 5 Apr 2025 16:16:22 +0200
> > Cc: 77469@debbugs.gnu.org
> >
> > > I hear you, but OTOH compiling this file will make the build a tad
> > > longer, so it is not coming for free.
> > >
> > > In general, we don't compile files that have no code.
> >
> > Yes, now I understand this much better, and that there is no point in
> > byte-compilation.
> >
> > Although adding a coding: ascii (or coding: utf-8) declaration at top
> > would help a little bit, as discussed in
> >
> https://github.com/nilcons/emacs-research/tree/master/parse-speed-byte-compile
>
> This shouldn't be necessary, since file-coding-system-alist already
> says that *.el files should be decoded as UTF-8.
>

I understand that, but as you see on the page, that's not the case.  I
intentionally compiled the webpage in a way that it's easy to download (git
clone) and reproduce, and I reproduced it on emacs 30.1 and on master
head.  Maybe it works differently in your environment?

El data loading is slower than byte compiled or el with utf8 coding header,
at least for me.

I think the difference is that in the alist elc is strongly utf8, but el is
only "prefer" utf8, do it still needs to spend cycles on some kind of
checking/detection.

Cheers,
Gergely