A related anecdote: One of the major reasons I decided to give elm a try was when Richard Feldman was giving a talk about writing Dream Writer in elm, and he go

A related anecdote: One of the major reasons I decided to give elm a try was when Richard Feldman was giving a talk about writing Dream Writer in elm, and he got to a point where the performance was noticeably slowing down. He started trying to make it better by 'sprinkling a few `lazy`s through the view code', and then stopped because that had magically made everything super fast again.