with-cache

Simple, filesystem-based caching.

0. Pick a directory to store caches in. By default, it's the ./compiled/with-cache directory.
1. Wrap "expensive" computations in a thunk, call the thunk via with-cache.
2. Results of the expensive computation are automatically stored and retrieved.

Example:

(with-cache "fact42.rktd"
  (λ () (factorial 42)))
(with-cache "pict.rktd"
  (λ () (standard-fish 100 50))
  #:read deserialize
  #:write serialize)

Install

From the Racket package server:

$ raco pkg install with-cache

From Github:

$ git clone https://github.com/bennn/with-cache
$ raco pkg install ./with-cache

Don't forget the ./!

More

The real documentation is here: http://docs.racket-lang.org/with-cache/index.html

and has instructions for:

• invalidating cachefiles
• changing the default cache directory
• cachefile naming conventions