| From: | Julien Rouhaud <rjuju123(at)gmail(dot)com> |
|---|---|
| To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
| Cc: | "ldh(at)laurent-hasson(dot)com" <ldh(at)laurent-hasson(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Big Performance drop of Exceptions in UDFs between V11.2 and 13.4 |
| Date: | 2021-09-01 05:14:24 |
| Message-ID: | CAOBaU_bohxqaJtO9JMvhh7m51VrurYjF4QvKmck+OZ13DUxaAw@mail.gmail.com |
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| Lists: | pgsql-performance |
On Wed, Sep 1, 2021 at 1:56 AM Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
>
> The culprit turns out to be the precise version of libiconv/libintl
> used. There is a slight difference between the versions used in the
> 11.13 installer and the 13.4 installer. We need to dig into performance
> more (e.g. why does the test take much longer on an NLS enabled build
> even when we are using 'initdb --no-locale'?) But I'm pretty confident
> now that this is the issue. I've started talks with our installer guys
> about fixing it.
FTR it's consistent with my own setup. I could finally compile
postgres with NLS support and libintl 0.18.1 and I only got a limited
overhead: the runtime increases from ~460ms to ~1.5s (and ~2s with
lc_messages to something else than C), but that's way better than the
~44s with the current edb version.
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