On Mon, May 8, 2023 at 11:22 PM Peter Eisentraut < peter.eisentr...@enterprisedb.com> wrote:
> On 23.04.23 08:42, Richard Guo wrote: > > Thanks for the suggestion. I've split the patch into two as attached. > > 0001 is just a minor simplification by replacing lfirst(list_head(list)) > > with linitial(list). 0002 introduces new functions to reduce the > > movement of list elements in several places so as to gain performance > > improvement and benefit future callers. > > These look sensible to me. If you could show some numbers that support > the claim that there is a performance advantage, it would be even more > convincing. Thanks Peter for looking at those patches. I tried to devise a query to show performance gain but did not succeed :-(. So I begin to wonder if 0002 is worthwhile to do, as it seems that it does not solve any real problem. Thanks Richard
