From: Michael Heerdegen <michael_heerdegen@web.de>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 52147@debbugs.gnu.org, Paul Pogonyshev <pogonyshev@gmail.com>
Subject: bug#52147: Eager macro-expansion is not performed in `eval-and-compile' functions
Date: Mon, 29 Nov 2021 20:14:51 +0100 [thread overview]
Message-ID: <8735nen590.fsf@web.de> (raw)
In-Reply-To: <87zgpnuft8.fsf@gnus.org> (Lars Ingebrigtsen's message of "Mon, 29 Nov 2021 16:44:51 +0100")
Lars Ingebrigtsen <larsi@gnus.org> writes:
> We usually don't stress a lot about the performance of interpreted
> (i.e., uncompiled) code.
Well we do, a bit,
(info "(elisp) How Programs Do Loading")
says that loading a file performs eager macro expansion and that does
speed up the resulting code. `eval', `eval-when-compile' and
`eval-and-compile' don't perform eager macro expansion. I don't know to
what degree this is on purpose. But if a macro is defined later in the
file or in another file that has not yet been loaded this may not be
possible anyway.
Michael.
next prev parent reply other threads:[~2021-11-29 19:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-27 19:37 bug#52147: Eager macro-expansion is not performed in `eval-and-compile' functions Paul Pogonyshev
2021-11-28 10:30 ` Michael Heerdegen
2021-11-28 21:53 ` Paul Pogonyshev
2021-11-29 15:44 ` Lars Ingebrigtsen
2021-11-29 19:14 ` Michael Heerdegen [this message]
2022-01-15 13:10 ` Lars Ingebrigtsen
2022-01-15 15:09 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-20 9:50 ` Lars Ingebrigtsen
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