pub fn top_artists(catalog: &Catalog, limit: usize) -> Vec<(Id, usize)>Expand description
The most present artists, by number of distinct tracks they are audible on.
Writing and production credits are excluded on purpose: a songwriter who
never performs would otherwise outrank the singers of their own catalog.
Those credits remain visible on the artist page and in top_writers.
We count tracks, not credits: an artist who is both performer and composer of a piece must not count it twice.