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From: Alan Mackenzie <acm@muc.de>
To: "Óscar Fuentes" <ofv@wanadoo.es>
Cc: emacs-devel@gnu.org
Subject: Re: master 289000e: Merge branch 'feature/native-comp' into trunk
Date: Mon, 26 Apr 2021 17:11:57 +0000	[thread overview]
Message-ID: <YIb0XbV9HzAZ86ib@ACM> (raw)
In-Reply-To: <87eeexm56d.fsf@telefonica.net>

Hello, Óscar.

On Mon, Apr 26, 2021 at 17:33:30 +0200, Óscar Fuentes wrote:
> Alan Mackenzie <acm@muc.de> writes:

> > I must be doing something differently from these people, but I can't
> > identify what.  Native compilation just doesn't seem to be working for
> > me, yet.  How much of a speed up should it give me?  Surely more than 5%
> > - 10%?

> native-comp speeds up Elisp, and even then there are lots of cases where
> the change is hardly noticeable.

> Let's say your code spends 90% on the C core and 10% on Elisp. If
> native-comp brings a 2x speed up, you'll only observe about 5%
> improvement.

It seems something like that is indeed happening.

> C code is opaque to native-comp and puts a hard limit on how much it can
> optimize Elisp. Thus I hope that in the future more and more code will
> be moved from C to Elisp.

Does that make sense?  To move time critical code from fast C to slow
Lisp, and then optimise it back, partly?

> And other areas can benefit too: one thing which IMO has lots of
> potential is to native-compile regexps.

Again, how would that work?  Regexps are already handled in C.  How
could native compilation of Lisp add anything?

-- 
Alan Mackenzie (Nuremberg, Germany).



  parent reply	other threads:[~2021-04-26 17:11 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210425182503.25223.81072@vcs0.savannah.gnu.org>
     [not found] ` <20210425182508.6CC7C2094D@vcs0.savannah.gnu.org>
2021-04-25 18:36   ` master 289000e: Merge branch 'feature/native-comp' into trunk Andrea Corallo via Emacs development discussions.
2021-04-25 18:40     ` Eli Zaretskii
2021-04-25 18:59       ` Andrea Corallo via Emacs development discussions.
2021-04-25 20:25         ` Eli Zaretskii
2021-04-25 18:45     ` Óscar Fuentes
2021-04-25 20:03     ` Alan Mackenzie
2021-04-25 20:14       ` Eli Zaretskii
2021-04-25 21:55         ` Alan Mackenzie
2021-04-26 11:40           ` Eli Zaretskii
2021-04-26 13:21             ` Alan Mackenzie
2021-04-26 13:45               ` Eli Zaretskii
2021-04-26 14:54                 ` Alan Mackenzie
2021-04-26 15:12                   ` Eli Zaretskii
2021-04-26 17:02                     ` Alan Mackenzie
2021-04-26 17:13                       ` Stefan Monnier
2021-04-26 17:25                       ` Eli Zaretskii
2021-04-28 11:34                         ` Alan Mackenzie
2021-04-28 12:26                           ` Eli Zaretskii
2021-04-28 12:32                             ` Alan Mackenzie
2021-04-28 13:01                               ` Eli Zaretskii
2021-04-28 19:09                               ` Andrea Corallo via Emacs development discussions.
2021-04-26 15:33                   ` Óscar Fuentes
2021-04-26 15:58                     ` Eli Zaretskii
2021-04-26 16:30                       ` Óscar Fuentes
2021-04-26 17:11                     ` Alan Mackenzie [this message]
2021-04-26 20:02                       ` Óscar Fuentes
2021-04-28 14:07                         ` Alan Mackenzie
2021-04-28 15:10                           ` Óscar Fuentes
2021-04-26 15:37                   ` Stefan Monnier
2021-04-26 16:06                   ` Andrea Corallo via Emacs development discussions.
2021-04-26 17:05                     ` Alan Mackenzie
2021-04-25 21:48     ` Stefan Monnier
2021-04-25 22:41     ` Stefan Kangas
2021-04-25 22:57     ` Clément Pit-Claudel
2021-04-26 16:16       ` Andrea Corallo via Emacs development discussions.
2021-04-26 13:03     ` wilde
2021-04-26 13:18     ` Minimal recommended version of gcc/libgccjit for native-comp (was: master 289000e: Merge branch 'feature/native-comp' into trunk) wilde
2021-04-26 15:58       ` Minimal recommended version of gcc/libgccjit for native-comp Stefan Monnier
2021-04-26 16:16         ` Eli Zaretskii
2021-04-26 16:32           ` Andrea Corallo via Emacs development discussions.
2021-04-26 16:54             ` Eli Zaretskii
2021-04-26 20:53               ` Andrea Corallo via Emacs development discussions.
2021-04-27  3:52               ` Richard Stallman
2021-04-26 16:18         ` Andrea Corallo via Emacs development discussions.
2021-04-26 16:12       ` Andrea Corallo via Emacs development discussions.
2021-04-27 14:21         ` wilde
2021-04-27 16:35           ` Andrea Corallo via Emacs development discussions.

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