From: Eli Zaretskii <eliz@gnu.org>
To: Phil Sainty <psainty@orcon.net.nz>
Cc: 32462@debbugs.gnu.org
Subject: bug#32462: 26.1; Can `count-lines' be rewritten to use the newline cache?
Date: Fri, 17 Aug 2018 17:40:35 +0300 [thread overview]
Message-ID: <834lftgios.fsf@gnu.org> (raw)
In-Reply-To: <f4a1f761ed4bae3148c446f6a067c79a@webmail.orcon.net.nz> (message from Phil Sainty on Fri, 17 Aug 2018 13:01:38 +1200)
> Date: Fri, 17 Aug 2018 13:01:38 +1200
> From: Phil Sainty <psainty@orcon.net.nz>
>
> `count-lines' uses a regexp search to find all the newlines (and/or
> carriage returns
It uses regexp search only when selective-display is in effect, which
means almost never. Otherwise, it uses forward-line, which uses
scan_newline_from_point, which already uses the newline cache (unless
the cache is disabled).
(And based on my experience, the newline cache doesn't actually speed
up things all that much, except in buffers with unusually long lines.)
next prev parent reply other threads:[~2018-08-17 14:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 1:01 bug#32462: 26.1; Can `count-lines' be rewritten to use the newline cache? Phil Sainty
2018-08-17 14:40 ` Eli Zaretskii [this message]
2018-08-18 12:10 ` Phil Sainty
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