Querying, and querying immediately after insertion. If you want queries after insertion (which require views), this can be slow in couch. Also, if you want to q

Querying, and querying immediately after insertion. If you want queries after insertion (which require views), this can be slow in couch. Also, if you want to query, but don't want to add a view, wait for it to populate (causing a performance hit while it builds, plus while it is up), then remove it. If you're doing primarily insertion with querying via id, and using views in which stale data is ok, then couch is far superior to mongo. But that's not a use case everyone has.