From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] master c66aaa6: Recomplexify ‘delete-trailing-whitespace’ by treating \n as whitespace again
Date: Wed, 15 Mar 2017 23:08:02 -0400 [thread overview]
Message-ID: <jwvinn9udiw.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: CAM-tV--oe=9PL2cq2PrSZk5U20roLNcYcZCT=q=-ksFTdD03OA@mail.gmail.com
>> I don't understand how "\\s-+$" can be significantly faster than
>> "[\s\t]+$" in this respect.
> What? I though I said "\\s-+" is *slower* (though only by a factor of 2).
The bug#26079 seems to indicate that the old Emacs-25 code was a lot faster.
Oh, I see. It's that the old code used "\\s-$" rather than "\\s-+$".
Yes, that old code does avoid the quadratic effect this way.
Stefan
prev parent reply other threads:[~2017-03-16 3:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170315023157.29463.36647@vcs0.savannah.gnu.org>
[not found] ` <20170315023159.30AA520CAB@vcs0.savannah.gnu.org>
2017-03-15 11:28 ` [Emacs-diffs] master c66aaa6: Recomplexify ‘delete-trailing-whitespace’ by treating \n as whitespace again Stefan Monnier
2017-03-15 12:09 ` Noam Postavsky
2017-03-15 14:50 ` Stefan Monnier
2017-03-15 17:05 ` Noam Postavsky
2017-03-15 20:26 ` Stefan Monnier
2017-03-16 0:18 ` Noam Postavsky
2017-03-16 2:52 ` Stefan Monnier
2017-03-16 3:04 ` Noam Postavsky
2017-03-16 3:08 ` Stefan Monnier [this message]
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