Re: Improve list manipulation in several places

Поиск
Список
Период
Сортировка
От Richard Guo
Тема Re: Improve list manipulation in several places
Дата
Msg-id CAMbWs4-eK-2PUm+HCv08Jf6BqR8vb0MVhqBB7ZS3NQ6pK8GAew@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Improve list manipulation in several places  (Peter Eisentraut <peter.eisentraut@enterprisedb.com>)
Список pgsql-hackers
Дерево обсуждения

On Mon, Jul 3, 2023 at 5:41 PM Peter Eisentraut <peter.eisentraut@enterprisedb.com> wrote:
On 09.05.23 05:13, Richard Guo wrote:
> Yeah, maybe this is the reason I failed to devise a query that shows any
> performance gain.  I tried with a query which makes the 'all_pathkeys'
> in sort_inner_and_outer being length of 500 and still cannot see any
> notable performance improvements gained by list_copy_move_nth_to_head.
> Maybe the cost of other parts of planning swamps the performance gain
> here?  Now I agree that maybe 0002 is not worthwhile to do.

I have committed patch 0001.  Since you have withdrawn 0002, this closes
the commit fest item.

Thanks for pushing it and closing the item!

Thanks
Richard

В списке pgsql-hackers по дате отправления:

Предыдущее
От: David Rowley
Дата:
Сообщение: Re: Making empty Bitmapsets always be NULL
Следующее
От: Yurii Rashkovskii
Дата:
Сообщение: Re: [PATCH] Extend the length of BackgroundWorker.bgw_library_name