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equalp of structs - speed
- To: <firstname.lastname@example.org>
- Subject: equalp of structs - speed
- From: email@example.com
- Date: Wed, 24 Sep 97 14:38:15 -0500
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(defstruct a (a0 0 :type number) (a1 0 :type number))
(defun a= (a0 a1)
(and (= (a-a0 a0) (a-a0 a1)) (= (a-a1 a0) (a-a1 a1))))
a= should be the same as equalp (and it seems to be), but equalp is
slightly less then twice as fast as a= compiled. One would expect
that, since equalp is a built-in, it would be at least 5 times faster
than a= (this is the case with home-brewed functions like length etc).
So, why is it that the performance win of using equalp instead of a=
is so low in CLISP?