From: "Basil L. Contovounesios" <contovob@tcd.ie>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Searching for line beginning
Date: Sun, 14 Aug 2022 18:33:00 +0300 [thread overview]
Message-ID: <878rnqq1qr.fsf@tcd.ie> (raw)
In-Reply-To: <831qtkm9ni.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 13 Aug 2022 18:43:29 +0300")
Eli Zaretskii [2022-08-13 18:43 +0300] wrote:
> C-a (move-beginning-of-line) does this to find the line's beginning:
>
> ;; Move to beginning-of-line, ignoring fields and invisible text.
> (skip-chars-backward "^\n")
> (while (and (not (bobp)) (invisible-p (1- (point))))
> (goto-char (previous-char-property-change (point)))
> (skip-chars-backward "^\n"))
>
> Apart of the fields part (which can be handled by binding
> inhibit-field-text-motion), can anyone see a reason why not use
> line-beginning-position instead? The latter is much faster,
> especially when lines are very long.
FWIW, one could also say (beginning-of-line) or (beginning-of-line 1)
instead of (goto-char (line-beginning-position)). But they boil down to
the same thing, so they should be very close in terms of performance.
Thanks,
--
Basil
next prev parent reply other threads:[~2022-08-14 15:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-13 15:43 Searching for line beginning Eli Zaretskii
2022-08-13 16:20 ` Stefan Monnier
2022-08-13 17:58 ` Eli Zaretskii
2022-08-14 12:54 ` Eli Zaretskii
2022-08-14 15:33 ` Basil L. Contovounesios [this message]
2022-08-14 15:36 ` Eli Zaretskii
2022-08-14 15:43 ` Lars Ingebrigtsen
2022-08-14 15:48 ` Eli Zaretskii
2022-08-15 4:28 ` Lars Ingebrigtsen
2022-08-15 11:29 ` Eli Zaretskii
2022-08-15 11:37 ` Lars Ingebrigtsen
2022-08-15 12:00 ` Eli Zaretskii
2022-08-17 2:49 ` Richard Stallman
2022-08-17 10:41 ` Lars Ingebrigtsen
2022-08-17 11:48 ` Eli Zaretskii
2022-08-17 11:52 ` Stefan Monnier
2022-08-18 12:37 ` Lars Ingebrigtsen
2022-08-14 17:24 ` Stefan Monnier
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