| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>, henry(at)zoo(dot)utoronto(dot)ca |
| Subject: | Re: Unicode combining characters |
| Date: | 2001-10-04 04:30:13 |
| Message-ID: | 200110040430.f944UDf16383@candle.pha.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
> > Ok. I ran the modified test (now the iteration is reduced to 100000 in
> > liketest()). As you can see, there's huge difference. MB seems up to
> > ~8 times slower:-< There seems some problems existing in the
> > implementation. Considering REGEX is not so slow, maybe we should
> > employ the same design as REGEX. i.e. using wide charcters, not
> > multibyte streams...
Let me add I think our regex code is very slow. It is the standard BSD
regex library by Henry Spencer. He rewrote it a few years ago for TCL
8.X and said he was working on a standalone library version. I have
asked him several times via email over the years but he still has not
released a standalone version of the new optimized regex code. It is on
our TODO list.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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