On Thu, Feb 14, 2013 at 2:15 PM, Robby Findler <ro...@eecs.northwestern.edu> wrote: > Is this a bottleneck in some real program? Perhaps you'd share that (or some > inner loop of it)? I wonder if there is a better way to speed it up than > this.
`hash-set!` (which, like `hash-update`, is written in Racket and hashes twice) is a real bottleneck in Typed Racket, in particular the duplicated hash computation. I believe this is mostly because of interning, where `equal?` hashes are used. A version of `hash-update` which hashed only once could (probably) speed this up significantly. Sam ____________________ Racket Users list: http://lists.racket-lang.org/users
