From: | Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> |
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To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: PG qsort vs. Solaris |
Date: | 2006-10-03 19:52:52 |
Message-ID: | 4522BF94.2050908@sun.com |
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Thread: | |
Lists: | pgsql-hackers |
Tom Lane wrote:
> Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> writes:
>> Is it time to "remove" PG qsort and use libc version for solaris 9, 10...?
>
> I have no particular desire to introduce a version number check until we
> have to. If you can show that the newer versions have a qsort that
> substantially *out-performs* ours, it would be worth doing that, but
> merely being competitive isn't enough to make it worth the trouble.
>
The implementation in the solaris uses same ideas like postgres
implementation exclude sort array detection. There are small difference
with threshold when median uses 9 items and threshold for insertion
sort. Performance is similarly - no winer (only on sorted array).
Zdenek
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