Re: [HACKERS] Small improvement to compactify_tuples

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От Peter Geoghegan
Тема Re: [HACKERS] Small improvement to compactify_tuples
Дата
Msg-id 20171104233559.GA8580@marmot
обсуждение исходный текст
Ответ на Re: [HACKERS] Small improvement to compactify_tuples  (Юрий Соколов <funny.falcon@gmail.com>)
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Юрий Соколов <funny.falcon@gmail.com> wrote:
>tps is also reflects changes:
>~17ktps with qsort
>~19ktps with bucket sort
>
>Also vacuum of benchmark's table is also improved:
>~3s with qsort,
>~2.4s with bucket sort

One thing that you have to be careful with when it comes to our qsort
with partially presored inputs is what I like to call "banana skin
effects":

https://postgr.es/m/CAH2-WzkU2xK2dpZ7N8-A1MvuUTTUvhqkfnA+eUtwNwCtgyCJgw@mail.gmail.com

This may have nothing at all to do with your results; I'm just pointing
it out as a possibility.

-- 
Peter Geoghegan


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