From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Qs on obarrays Date: Wed, 12 Oct 2005 11:53:22 -0400 Organization: Bell Sympatico Message-ID: <87wtki4tsl.fsf-monnier+gnu.emacs.help@gnu.org> References: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1129132659 15612 80.91.229.2 (12 Oct 2005 15:57:39 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Wed, 12 Oct 2005 15:57:39 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Oct 12 17:57:28 2005 Return-path: Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1EPixG-0005Ii-FD for geh-help-gnu-emacs@m.gmane.org; Wed, 12 Oct 2005 17:55:46 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1EPixF-0003th-O2 for geh-help-gnu-emacs@m.gmane.org; Wed, 12 Oct 2005 11:55:45 -0400 Original-Newsgroups: gnu.emacs.help User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) Cancel-Lock: sha1:AQJshRbS30iuDGn2UilxjK3jt+8= Original-Lines: 12 Original-NNTP-Posting-Host: 70.48.81.29 Original-X-Complaints-To: abuse@sympatico.ca Original-X-Trace: news20.bellglobal.com 1129132402 70.48.81.29 (Wed, 12 Oct 2005 11:53:22 EDT) Original-NNTP-Posting-Date: Wed, 12 Oct 2005 11:53:22 EDT Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!postnews.google.com!news3.google.com!news.glorb.com!news.louisville.edu!tor-nx1!webster!nf1.bellglobal.com!nf2.bellglobal.com!news20.bellglobal.com.POSTED!not-for-mail Original-Xref: shelby.stanford.edu gnu.emacs.help:134592 Original-To: help-gnu-emacs@gnu.org X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:30173 Archived-At: > Also, the obarray length must be supplied to make-vector. Anyone know a > heuristic for a good vector length to use when you expect a certain number > of symbols? I notice that the length of standard variable `obarray's value > is 1511 (prime, presumably). If I expect on the order of N symbols, what is > a good length to use? Or is there no simple formula? If not, anyone know a > good length for, say, 100 symbols? In most cases, you can advantageously use a hashtable instead of an obarray. Those are automatically resized. Stefan