|
| From: | Stefan Monnier |
| 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 |
| User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
>> 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 in Thread] | Current Thread | [Next in Thread] |