GNU bug report logs - #52147
Eager macro-expansion is not performed in `eval-and-compile' functions

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From: Paul Pogonyshev <pogonyshev <at> gmail.com>
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 52147 <at> debbugs.gnu.org
Subject: bug#52147: Eager macro-expansion is not performed in `eval-and-compile' functions
Date: Sun, 28 Nov 2021 22:53:52 +0100

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That's what the subject says. I know that it works regardless, but the
performance suffers, especially if the used macros are complex.

Paul

On Sun, 28 Nov 2021 at 11:30, Michael Heerdegen <michael_heerdegen <at> web.de>
wrote:

> Hello Paul,
>
> > (eval-and-compile
> >   (defun my-func-eac (what)
> >     (my-macro what)))
> >
> > (defun my-func-normal (what)
> >   (my-macro what))
> >
> > (print (symbol-function 'my-func-eac))
> > (print (symbol-function 'my-func-normal))
> >
> > `eval-and-compile' is advertised in Elisp manual to make
> > byte-compilation of certain macros without prior loading
> > possible. Looks strange that at the same time it can worsen
> > performance of non-byte-compiled code.
>
> Is the issue you want to draw attention to that an interpreted
> `eval-and-compile' form doesn't macroexpand its body?
>
> Michael.
>

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