Re: ResourceOwner refactoring - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: ResourceOwner refactoring
Date
Msg-id 113f69b8-04f4-93be-1bae-0c2dfa40426d@iki.fi
Whole thread Raw
In response to Re: ResourceOwner refactoring  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
Responses Re: ResourceOwner refactoring  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
On 18/01/2021 16:34, Alvaro Herrera wrote:
> So according to your performance benchmark, we're willing to accept a
> 30% performance loss on an allegedly common operation -- numkeep=0
> numsnaps=10 becomes 49.8ns from 37.6ns.  That seems a bit shocking.
> Maybe you can claim that these operations aren't exactly hot spots, and
> so the fact that we remain in the same power-of-ten is sufficient.  Is
> that the argument?

That's right. The fast path is fast, and that's important. The slow path 
becomes 30% slower, but that's acceptable.

- Heikki



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