| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Notes about fixing regexes and UTF-8 (yet again) |
| Date: | 2012-02-18 02:17:27 |
| Message-ID: | 12169.1329531447@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
I wrote:
> The answer, on a reasonably new desktop machine (2.0GHz Xeon E5503)
> running Fedora 16 in en_US.utf8 locale, is that 64K iterations of
> pg_wc_isalpha or sibling functions requires a shade under 2ms.
> So this definitely justifies caching the values to avoid computing
> them more than once per session, but I'm not convinced there are
> grounds for trying harder than that.
And here's a poorly-tested draft patch for that.
regards, tom lane
| Attachment | Content-Type | Size |
|---|---|---|
| fix-regex-locales-one-more-time.patch | text/x-patch | 13.3 KB |
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