40% faster by precomputing vector norms
40% faster by precomputing vector norms

tjrileywisc/annoy,eddelbuettel/annoy,spotify/annoy,spotify/annoy,eddelbuettel/annoy,eddelbuettel/annoy,tjrileywisc/annoy,tjrileywisc/annoy,eddelbuettel/annoy,tjrileywisc/annoy,spotify/annoy,spotify/annoy