From: Andreas Seltenreich <seltenreich@gmx.de>
To: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Improving executor performance
Date: Thu, 14 Jul 2016 20:04:03 +0200
Message-ID: <878tx42j1o.fsf@credativ.de> (raw)
In-Reply-To: <20160714011850.bd5zhu35szle3n3c@alap3.anarazel.de>
References: <20160624232953.beub22r6yqux4gcp@alap3.anarazel.de>
<20160714011850.bd5zhu35szle3n3c@alap3.anarazel.de>
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Andres Freund writes:
> Having expression evaluation and slot deforming as a series of simple
> sequential steps, instead of complex recursive calls, would also make it
> fairly straightforward to optionally just-in-time compile those.
I don't think that JIT becomes easier by this change. Constructing the
IR for LLVM, libFirm or any other JIT library from expression trees is
straightforward already. It's probably more of a nuisance for those
that already have some code/design on JIT-compiling expressions
(vitessedb, ISP RAS, yours truly)
I like your patch for all the other reasons stated though!
regards
Andreas
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To: pgsql-hackers@postgresql.org
Cc: seltenreich@gmx.de, andres@anarazel.de
Subject: Re: Improving executor performance
In-Reply-To: <878tx42j1o.fsf@credativ.de>
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