I think Haystack is awesome but when the Faiss vector index starts getting too large their default 'Flat' index is too slow. I think a lot of people miss that t

I think Haystack is awesome but when the Faiss vector index starts getting too large their default 'Flat' index is too slow. I think a lot of people miss that they can fix that using custom Faiss indexes, which are set using `faiss_index_factory_str` when initializing the index. I built a big course on vector search (it's free), and more specific to this problem, an article covering these index factory strings and how to build good indexes with them - hopefully it's useful! https://www.pinecone.io/learn/composite-indexes/ https://www.pinecone.io/learn/composite-indexes/