See the header in the source file for details. It's very easy to use:
(require 'memoize)
(memoize 'my-function)The macro defmemoize is also provided to directly create memoized
functions:
(defmemoize my-expensive-function (n)
(if (zerop n)
1
(* n (my-expensive-function (1- n)))))Some functions are run over buffer contents, and need to be cached
only so long as the buffer contents do not change. For these
use-cases, we have the function memoize-by-buffer-contents as well
as the defmemoize-by-buffer-contents macro.
To restore the original definition of a memoized function symbol (not
a lambda or closure), use memoize-restore:
(memoize 'my-function)
(memoize-restore 'my-function)