Hello,
Sorry, I sent a wrong version of the patch, contains some spelling errors. This is the right one.Sigh.. I fixed some more wordings.
I have submitted a patch which reworks how things are computed so that performance figures make some/more sense, among other things.
Maybe you could have a look at it and tell whether it is an improvement wrt your issue?
https://commitfest.postgresql.org/29/2557/ -- Fabien.
