Re: JIT compiling with LLVM v12

From: Noah Misch <noah(at)leadboat(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: JIT compiling with LLVM v12
Date: 2018-08-25 17:36:03
Message-ID: 20180825173603.GA960093@rfd.leadboat.com
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On Wed, Aug 22, 2018 at 06:20:21AM +0000, Noah Misch wrote:
> On Wed, Mar 28, 2018 at 02:27:51PM -0700, Andres Freund wrote:
> > For now LLVM is enabled by default when compiled --with-llvm. I'm mildly
> > inclined to leave it like that until shortly before the release, and
> > then disable it by default (i.e. change the default of jit=off). But I
> > think we can make that decision based on experience during the testing
> > window. I'm opening an open items entry for that.
>
> I'll vote for jit=on and letting any bugs shake out earlier, but it's not a
> strong preference.

In light of later discussion on this thread, my preference bore undue
optimism. I maintain that vote philosophically, but that course of action
probably entails too much short-term development work. jit=off is reasonable,
along with documentation changes to set expectations.

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