GNU bug report logs - #45652
so-long mode not triggered despite big file with very long lines

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Message #28 received at 45652 <at> debbugs.gnu.org (full text, mbox):

From: Phil Sainty <psainty <at> orcon.net.nz>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 45652 <at> debbugs.gnu.org,
 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Subject: Re: bug#45652: so-long mode not triggered despite big file with very
 long lines
Date: Tue, 12 Jan 2021 08:18:42 +1300

On 12/01/21 7:39 am, Lars Ingebrigtsen wrote:
> Have you considered adding a C-level primitive that just looks at the
> entire buffer?  It should be reasonably simple and very fast -- just
> count areas between "\n"s, skipping the buffer gap.  We don't have to
> care about characters as such, I think, so this should be massively
> faster than counting line lengths in Lisp.

Agreed.  See my reply to Dan a few minutes ago for a similar thought.

I don't know what the correct approach to this would be, but there's
definitely scope for some kind of improvement along these lines (pun
not intended :)


-Phil

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