| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: levenshtein_less_equal (was: multibyte charater set in levenshtein function) |
| Date: | 2010-10-13 14:18:01 |
| Message-ID: | 1286979419-sup-9868@alvh.no-ip.org |
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| Lists: | pgsql-hackers |
Excerpts from Tom Lane's message of mié oct 13 10:32:36 -0300 2010:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > I spent some time hacking on this. It doesn't appear to be too easy
> > to get levenshtein_less_equal() working without slowing down plain old
> > levenshtein() by about 6%.
>
> Is that really enough slowdown to be worth contorting the code to avoid?
> I've never heard of an application where the speed of this function was
> the bottleneck.
What if it's used on a expression index on a large table?
--
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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