Re: patch for geqo tweaks

From: Thom Brown <thom(at)linux(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: patch for geqo tweaks
Date: 2015-09-08 15:47:36
Message-ID: CAA-aLv7x4a6_4LLeoPAOtV-mDpg7+Ys2bHQ-T4S3dJC7JwwwqA@mail.gmail.com
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On 8 September 2015 at 14:44, Nathan Wagner <nw+pg(at)hydaspes(dot)if(dot)org> wrote:

> I have two patches to make the geqo initialization and mutation
> slightly better.
>
> The first adjusts the mutation swaps to avoid having to re-pick
> ties. The second changes the initialization and shuffling algorithm
> for the gene array to use an in-place Fisher-Yates shuffling
> algorithm.
>

Could you provide a demonstration of these being beneficial with a test
cases?

--
Thom

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