From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: pcase defuns Date: Sun, 27 Mar 2022 05:31:11 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7327"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Andrew Hyatt Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Mar 27 11:32:52 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nYPGW-0001hX-6Y for ged-emacs-devel@m.gmane-mx.org; Sun, 27 Mar 2022 11:32:52 +0200 Original-Received: from localhost ([::1]:46148 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nYPGU-0001rq-QC for ged-emacs-devel@m.gmane-mx.org; Sun, 27 Mar 2022 05:32:50 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:45498) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nYPF2-00019d-7c for emacs-devel@gnu.org; Sun, 27 Mar 2022 05:31:20 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:2430) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nYPEz-0002Ka-6h for emacs-devel@gnu.org; Sun, 27 Mar 2022 05:31:18 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 83A321001D2; Sun, 27 Mar 2022 05:31:15 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 458B5100009; Sun, 27 Mar 2022 05:31:14 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1648373474; bh=fFrQ836m79KyUO6SgmfI3UkzYgD7Y++xiMvSJ46UicY=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=lSNzY0iVIMRG3aU1dq//hVy9vMhKDQpQngvvqE07M8F+TAQ4ia3z1BXsI14ovEngh KUwH79UYWWhS6yExsSwtE6ChUFoXMr1HvK9PeoI++Lc6AE+558c1qc0GCjEjqpbHhv +RkvnMhvyassmca4jBfOAQAjgeQGHqANEdihGn/1nCwCOwrITIaxRgM3D0dvF4KbMO aAihC7mpX/92zE3N9sU2jxUXJrRVjNfJqyo8Pbuk92jdxz5WMSL8KHWype9OT1pIPB 9nNwwn1O6ig0Pd+qU1EEFpz1sSkaqS1zFBxNFKJm59Zs6i9SuQ8dSC6aUGDi/E+Xj6 uYyNfrwk2aYcg== Original-Received: from ceviche (dyn.144-85-153-166.dsl.vtx.ch [144.85.153.166]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 95A3D12066F; Sun, 27 Mar 2022 05:31:13 -0400 (EDT) In-Reply-To: (Andrew Hyatt's message of "Sat, 26 Mar 2022 13:41:26 -0400") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:287506 Archived-At: > (defun-pattern fibonacci > "Compute the fibonacci sequence." > ((0) 0) > ((1) 1) > ((n) > (+ (fibonacci (- n 1)) > (fibonacci (- n 2))))) If you go and benchmark this function, you'll see that its performance sucks even more than the usual naive fibonacci that it appears to be implementing. Stefan