From: pjb@informatimago.com (Pascal J. Bourguignon)
To: help-gnu-emacs@gnu.org
Subject: Re: Perferr cond over case?
Date: Sun, 11 Oct 2009 20:17:33 +0200 [thread overview]
Message-ID: <87fx9pre0y.fsf@galatea.local> (raw)
In-Reply-To: b239d9a1-0d91-4e69-8d73-72a0f6cffa91@g23g2000yqh.googlegroups.com
Nordlöw <per.nordlow@gmail.com> writes:
> Does the use of the cl macro case() incurr some loss of performance
> compare to using cond() instead?
(macroexpand '(case (* 2 2 2 2 3)
(10 'one)
((24 42) 'two)
((3 33) 'three)
(otherwise 'unknown)))
-->
(let ((--cl-var-- (* 2 2 2 2 3)))
(cond ((eql --cl-var-- (quote 10)) (quote one))
((member* --cl-var-- (quote (24 42))) (quote two))
((member* --cl-var-- (quote (3 33))) (quote three))
(t (quote unknown))))
What do you think?
--
__Pascal Bourguignon__
next prev parent reply other threads:[~2009-10-11 18:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-11 12:09 Perferr cond over case? Nordlöw
2009-10-11 18:17 ` Pascal J. Bourguignon [this message]
2009-10-12 8:03 ` David Kastrup
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