[joshberkus]

You'll be interested in ongoing work in this area, then. Oleg & Teodor are working on a new index type (RUM indexes, no less) which will speed up ranking operations conserably.

https://lwn.net/Articles/689387/

[ngrilly]

Hi Josh. Yes, I'm aware of this new type of index. Oleg was even kind enough to answer my email asking a few question about it :-)