msokolov commented on PR #14097: URL: https://github.com/apache/lucene/pull/14097#issuecomment-2573825107
I am not sure, but surmising that search performance is improved because of some combination of (1) graph ordinal decoding being faster (since we encode using VInts and these are now smaller), and (2) improved memory locality something something - I mean we are in theory comparing vectors that are nearer to each other in virtual memory space - not sure how that could/would affect anything though. I admit this is pretty hand-wavy, but it's the best I've got -- the only change here is that more similar vectors are now nearer to each other in docid (and thus vector ordinal) space, and a follow-on from that is that delta encoding in the HNSW graph is more compact/efficient. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
