And here's a commitfest link: https://commitfest.postgresql.org/10/743/
Also, a correction to my original message: the unreferenced [1] footnote points back to the thread that included the patch for UUID SortSupport. [1] https://www.postgresql.org/message-id/CAM3SWZR4avsTwwNVUzRNbHk8v36W-QBqpoKg=ogkwwy0dkt...@mail.gmail.com On Fri, Aug 26, 2016 at 10:44:22AM -0700, Brandur wrote: > Hello, > > I've attached a patch to add SortSupport for Postgres' macaddr which has the > effect of improving the performance of sorting operations for the type. The > strategy that I employ is very similar to that for UUID, which is to create > abbreviated keys by packing as many bytes from the MAC address as possible > into > Datums, and then performing fast unsigned integer comparisons while sorting. > > I ran some informal local benchmarks, and for cardinality greater than 100k > rows, I see a speed up on `CREATE INDEX` of roughly 25% to 65%. (For those > interested, I put a few more numbers into a small report here [2].) > > Admittedly, this is not quite as useful as speeding up sorting on a more > common > data type like TEXT or UUID, but the change still seems like a useful > performance improvement. I largely wrote it as an exercise to familiarize > myself with the Postgres codebase. > > I'll add an entry into the current commitfest as suggested by the Postgres > Wiki > and follow up here with a link. > > Thanks, and if anyone has feedback or other thoughts, let me know! > > Brandur > > [1] > https://www.postgresql.org/message-id/CAM3SWZR4avsTwwNVUzRNbHk8v36W-QBqpoKg=ogkwwy0dkt...@mail.gmail.com > [2] > https://docs.google.com/spreadsheets/d/1cUqbg9RTgSo16WrrfJJwDP1eDaWL3TNOxnIOFNpfwgA/edit?usp=sharing -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
