| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andrey Borodin <x4mmm(at)yandex-team(dot)ru> |
| Cc: | Gasper Zejn <zejn(at)owca(dot)info>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: pglz performance |
| Date: | 2019-11-01 12:33:32 |
| Message-ID: | 3c2d92d0-e715-f9ed-e1a7-3c510ed65940@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 2019-10-25 07:05, Andrey Borodin wrote:
>> 21 окт. 2019 г., в 14:09, Andrey Borodin <x4mmm(at)yandex-team(dot)ru> написал(а):
>>
>> With Silesian corpus pglz_decompress_hacked is actually decreasing performance on high-entropy data.
>> Meanwhile pglz_decompress_hacked8 is still faster than usual pglz_decompress.
>> In spite of this benchmarks, I think that pglz_decompress_hacked8 is safer option.
>
> Here's v3 which takes into account recent benchmarks with Silesian Corpus and have better comments.
Your message from 21 October appears to say that this change makes the
performance worse. So I don't know how to proceed with this.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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