bug#64712: 29.0.92; Emacs 29 with native compilation compiles cl-loaddefs.el on every startup

[Dmitry Gutov]

On 03/09/2023 08:15, Eli Zaretskii wrote:
> > I personally can't see that it would make much of a difference if we
> > have them or not, but maybe I'm missing something.
> If nothing else, it will slow down startup (because each .eln files
> needs to be loaded via dlopen, as opposed to .elc that is dumped into
> the pdumper file), albeit insignificantly.  But if we do this with all
> the autoload files we have, that could slow down in a more tangible
> ways.  So basically we have here two minor annoyances: you can solve
> one, but then you "gain" the other one.

So you suppose

  - Findinb .eln in its load path
  - dlopen-ing it

can be slower than

  - Looking for .eln in its load path, not finding it
  - Extracting cl-loaddefs.el from cl-loaddefs.el.gz
  - Loading it

?