Lenses are a popular approach to bidirectional transformations, a generalization of the view update problem in databases, in which we wish to make changes to source tables to effect a desired change on a view. However, perhaps surprisingly, lenses have seldom actually been used to implement updatable views in databases. Bohannon, Pierce and Vaughan proposed an approach to updatable views called relational lenses over 10 years ago, which offered a number of advantages over existing approaches to view update, but to the best of our knowledge this proposal has not been implemented or evaluated to date. We propose incremental relational lenses, which improve on prior work by equipping relational lenses with change-propagating semantics that map small changes to the view to small changes to the source tables. We also present a language-integrated implementation of relational lenses and a detailed experimental evaluation, showing orders of magnitude improvement over the non-incremental approach. Our work shows that relational lenses can be used to support expressive and efficient view updates at the language level, without relying on updatable view support from the underlying database.