What are your current thoughts?
Thanks for prodding. I still think it's a useful feature. However I
don't think I'll have to time to get it done on the current commitfest.
I suggest to let it sit in the commitfest to see if somebody else will
pick it up -- and if not, we move it to the next one, with apologies to
author and reviewers.
I may have time to become familiar or at least semi-comfortable with all
that weird math in it by then.
Yep.
Generating a parametric good-quality low-cost (but not
cryptographically-secure) pseudo-random permutations on arbitrary sizes
(not juste power of two sizes) is not a trivial task, I had to be quite
creative to achieve it, hence the "weird" maths. I had a lot of bad
not-really-working ideas before the current status of the patch.
The code could be simplified if we assume that PG_INT128_TYPE will be
available on all relevant architectures, and accept the feature not to be
available if not.
--
Fabien.
