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From: Mark Dilger <mark.dilger@enterprisedb.com>
To: Andrey Borodin <x4mmm@yandex-team.ru>
Cc: Justin Pryzby <pryzby@telsasoft.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: pglz compression performance, take two
Date: Mon, 28 Jun 2021 09:33:53 -0700
Message-ID: <B1D3105C-D68B-445F-B3DF-E3F41FE79C46@enterprisedb.com> (raw)
In-Reply-To: <90649B7F-EF71-40F7-93D0-1029AD0D90F3@enterprisedb.com>
References: <FEF3DC5E-4BC4-44E1-8DEB-DADC67046FE3@yandex-team.ru>
	<D75ABE30-2AAA-47DB-A89F-665E03BAAD2A@yandex-team.ru>
	<25991595-1848-4178-AA57-872B10309DA2@yandex-team.ru>
	<20201230043930.GG25152@telsasoft.com>
	<BF0A7E6D-AB21-47F8-A5FA-328CAA32DB12@yandex-team.ru>
	<20210122024811.GE27167@telsasoft.com>
	<EB24F56E-901B-46D6-BFFC-71D51603ABDE@enterprisedb.com>
	<88C049C6-1B86-4EF7-940D-585B07FEB81B@yandex-team.ru>
	<90649B7F-EF71-40F7-93D0-1029AD0D90F3@enterprisedb.com>



> On Jun 28, 2021, at 9:05 AM, Mark Dilger <mark.dilger@enterprisedb.com> wrote:
> 
> Is it worth sharting a static inline function that uses your optimization in other places?  

s/sharting/sharing/

> How confident are you that your optimization really helps?

By which I mean, is the optimization worth the extra branch checking if (len >= 16)?  Is the 14% speedup you report dependent on this extra complexity?

—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company








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