preserve

preserve is a combinator that caches the result of a procedure for a given number of seconds.

Example

(define slow-plus (preserve 5 +))

(list (slow-plus 1 2) (slow-plus 3 4))

This returns (3 3). Calling (slow-plus 3 4) five seconds later returns 7.

Code

sudo chicken-install preserve

For a repo,

git clone https://idiomdrottning.org/preserve