GNU bug report logs - #22763
25.1.50; Feature Request -- A faster method to obtain line number at position.

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Package: emacs;

Reported by: Keith David Bershatsky <esq <at> lawlist.com>

Date: Mon, 22 Feb 2016 02:44:01 UTC

Severity: wishlist

Tags: fixed

Found in version 25.1.50

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 22763 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, esq <at> lawlist.com
Subject: bug#22763: 25.1.50; Feature Request -- A faster method to obtain line number at position.
Date: Sun, 07 Feb 2021 15:37:28 -0500

> So ... it's using the cache is only faster when we have monumentally
> long lines, since memchr is so fast?  And in buffers with lines with
> normal line lengths, it's 10x slower?  That sounds like a rather drastic
> trade-off.

Yes, the problem is when you have pathologically-long lines (typically,
when the whole file has virtually no \n in it, so lines can reach
multi-MB lengths).


        Stefan
This bug report was last modified 3 years and 364 days ago.

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