danshapero / cl-hamt Goto Github PK
View Code? Open in Web Editor NEWDictionary and set data structures using hash array-mapped tries (HAMT)
License: BSD 3-Clause "New" or "Revised" License
Dictionary and set data structures using hash array-mapped tries (HAMT)
License: BSD 3-Clause "New" or "Revised" License
Inside the test set-equality, this form
(is-false (set-eq (apply 'set-insert (cons (empty-set) some-numbers)) (apply 'set-insert (cons (empty-set) (cdr some-numbers)))))
may fail if the car of some-numbers appears in the cdr of it. Since some-numbers is made of random numbers, that can happen (the probability is around 10%).
It would be nice to have hash-set=
and hash-dict=
functions. I can do (zerop (set-size (set-symmetric-diff a b)))
but that seems awkward...
This paper demonstrates ways to optimize HAMTs, apparently with some sizable performance gains. I should implement this and benchmark it against the current code.
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