all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
From: Dmitry Gutov <dgutov@yandex.ru>
To: Lars Ingebrigtsen <larsi@gnus.org>, emacs-devel@gnu.org
Subject: Re: A faster derived-mode-p
Date: Mon, 15 Feb 2021 00:25:57 +0200	[thread overview]
Message-ID: <428be4d8-9b35-c581-1357-20bb6ecb1ed8@yandex.ru> (raw)
In-Reply-To: <87k0ra9z7w.fsf@gnus.org>

On 14.02.2021 22:22, Lars Ingebrigtsen wrote:
> There are only 11K commands in the Emacs tree, so I don't know whether
> the current default completion predicate is going to turn out to be
> problematically slow or not.

I just evaluated

   (length (cl-delete-if-not #'commandp obarray))

in a running Emacs session with a bunch of third-party packages 
installed and loaded, and that still evaluated only to 1083.

So if derived-mode-p only needs to run 1000 times or so, perhaps it can 
still be fast enough, however inefficient it might look. I'd also 
recommend benchmarking with both implementations, if it's really too slow.

Also see the whole other implementation approach I mentioned in another 
thread.



  reply	other threads:[~2021-02-14 22:25 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-14 20:22 A faster derived-mode-p Lars Ingebrigtsen
2021-02-14 22:25 ` Dmitry Gutov [this message]
2021-02-14 22:45   ` Basil L. Contovounesios
2021-02-14 23:03     ` Óscar Fuentes
2021-02-15  2:34     ` Dmitry Gutov
2021-02-15  2:47       ` Lars Ingebrigtsen
2021-02-14 23:51 ` Stefan Monnier
2021-02-15  2:56   ` Lars Ingebrigtsen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=428be4d8-9b35-c581-1357-20bb6ecb1ed8@yandex.ru \
    --to=dgutov@yandex.ru \
    --cc=emacs-devel@gnu.org \
    --cc=larsi@gnus.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.