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From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Andrey Borodin <x4mmm@yandex-team.ru>
Cc: Gasper Zejn <zejn@owca.info>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: pglz performance
Date: Wed, 4 Sep 2019 14:40:07 +0200
Message-ID: <862cac5c-60f5-0fde-9451-8b294472c57d@2ndquadrant.com> (raw)
In-Reply-To: <B297A106-FFB1-4B5D-9D9A-6FFBAB16A279@yandex-team.ru>
References: <469C9ED9-348C-4FE7-A7A7-B0FA671BEE4C@yandex-team.ru>
	<20190513071427.GB2273@paquier.xyz>
	<446036FB-EA13-4F18-B593-70EDE0A35366@yandex-team.ru>
	<2035A8B0-AB54-4ADB-BEFE-ADABEC7BDADF@yandex-team.ru>
	<7d2fca56-48de-e459-2102-4a59d5f6c704@owca.info>
	<6375726F-B5D9-4C3E-AB69-580A54921099@yandex-team.ru>
	<91C5B481-7D99-4FE3-B540-035008B00CF1@yandex-team.ru>
	<c9af20cf-26e0-092c-910e-700fbd563f44@2ndquadrant.com>
	<B297A106-FFB1-4B5D-9D9A-6FFBAB16A279@yandex-team.ru>

On 2019-09-04 11:22, Andrey Borodin wrote:
>> What about the two patches?  Which one is better?
> On our observations pglz_decompress_hacked.patch is best for most of tested platforms.
> Difference is that pglz_decompress_hacked8.patch will not appply optimization if decompressed match is not greater than 8 bytes. This optimization was suggested by Tom, that's why we benchmarked it specifically.

The patches attached to the message I was replying to are named

0001-Use-memcpy-in-pglz-decompression-for-long-matches.patch
0001-Use-memcpy-in-pglz-decompression.patch

Are those the same ones?

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services





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