From: Paul Eggert <eggert@cs.ucla.edu>
To: Nathan Moreau <nathan.moreau@m4x.org>, Chen Bin <chenbin.sh@gmail.com>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: Re: [PATCH] add 'string-distance' to calculate Levenshtein distance
Date: Sat, 14 Apr 2018 10:36:49 -0700 [thread overview]
Message-ID: <b4ecec5c-44bd-2036-ccf2-65f2d8c026bf@cs.ucla.edu> (raw)
In-Reply-To: <CADDcBWV3zy2QxPOZOhdWS=8wG9BeDjSiBuTUf6Ub2a2y+YMKTQ@mail.gmail.com>
Nathan Moreau wrote:
> What is the difference with the code present in lib/diffseq.h?
lib/diffseq.h uses the Myers-Ukkonen algorithm that scales better for the common
case where strings are closely related. If the two strings are length N and
their Levenshtein distance is D (where D is much less than N), then
lib/diffseq.h is O(N*D) whereas the proposed algorithm is O(N**2).
So yes, it'd be better if the code used lib/diffseq.h rather than rolled its own
algorithm.
next prev parent reply other threads:[~2018-04-14 17:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-14 2:35 [PATCH] add 'string-distance' to calculate Levenshtein distance Chen Bin
2018-04-14 7:05 ` Eli Zaretskii
[not found] ` <87lgdq831h.fsf@gmail.com>
2018-04-14 13:24 ` Eli Zaretskii
2018-04-14 16:40 ` Chen Bin
2018-04-14 17:08 ` Eli Zaretskii
2018-04-15 7:15 ` Chen Bin
2018-04-15 14:47 ` Eli Zaretskii
[not found] ` <CAAE-R+-RDWvyrv+uqHszzh6VMH6An3disOw=PyPWaTnUTHDOCw@mail.gmail.com>
[not found] ` <83k1t72b2o.fsf@gnu.org>
2018-04-17 2:43 ` chen bin
2018-04-17 15:44 ` Eli Zaretskii
2018-04-18 7:11 ` chen bin
[not found] ` <CAAE-R+8s++_LRcQCLX60Z=TQeQHdtbM5X1k525bfNnnPSLDvRw@mail.gmail.com>
[not found] ` <83bmei36dw.fsf@gnu.org>
2018-04-17 12:31 ` chen bin
2018-04-19 8:05 ` Eli Zaretskii
2018-04-19 14:55 ` chen bin
2018-04-20 4:37 ` chen bin
2018-04-20 6:01 ` Thien-Thi Nguyen
2018-04-20 10:47 ` chen bin
2018-04-21 7:22 ` Eli Zaretskii
2018-04-21 20:47 ` Juri Linkov
2018-04-28 7:36 ` Eli Zaretskii
2018-05-06 9:53 ` chen bin
2018-04-15 18:53 ` Paul Eggert
2018-04-14 17:18 ` Nathan Moreau
2018-04-14 17:36 ` Paul Eggert [this message]
2018-04-15 18:17 ` Andreas Politz
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