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Re: Idea for minor tstore optimization

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Neil Conway <neilc(at)samurai(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Idea for minor tstore optimization
Date: 2008-02-27 22:48:53
Message-ID: 10240.1204152533@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Neil Conway <neilc(at)samurai(dot)com> writes:
> I notice that several of the call sites of tuplestore_puttuple() start
> with arrays of datums and nulls, call heap_form_tuple(), and then switch
> into the tstore's context and call tuplestore_puttuple(), which
> deep-copies the HeapTuple into the tstore. ISTM it would be faster and
> simpler to provide a tuplestore_putvalues(), which just takes the datum
> + nulls arrays and avoids the additional copy.

Seems reasonable.  Check whether tuplesort should offer the same, while
you are at it.

			regards, tom lane

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