Re: JIT compiling with LLVM v12.2

From: Andres Freund <andres(at)anarazel(dot)de>
To: Konstantin Knizhnik <k(dot)knizhnik(at)postgrespro(dot)ru>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: JIT compiling with LLVM v12.2
Date: 2018-03-30 15:54:45
Message-ID: 20180330155445.x5yg7wiv554tnubu@alap3.anarazel.de
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On 2018-03-30 15:12:05 +0300, Konstantin Knizhnik wrote:
> I have repeated performance tests at my computer and find out some
> regression comparing with previous JIT version.
> Previously JIT provides about 2 times improvement at TPC-H Q1. Now the
> difference is reduced to 1.4 without parallel execution and 1.3 with
> parallel execution:

Huh. That's the same computer you did the tests on?

There shouldn't have been any, I'll check it out.

- Andres

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