From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#25122: 24.5; function describe-variable hangs on large variables Date: Sun, 12 Mar 2017 12:29:16 -0400 Message-ID: References: <20161206022112.GF25778@E15-2016.optimum.net> <87twahk19y.fsf@gmail.com> <87d1h4fld5.fsf@users.sourceforge.net> <871sxkyv2m.fsf@gmail.com> <87mvcs8j7w.fsf@users.sourceforge.net> <87lgsbtxwe.fsf@gmail.com> <871su38ogm.fsf@users.sourceforge.net> <87d1dnrq96.fsf@gmail.com> <87wpbu7f9i.fsf@users.sourceforge.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1489336215 22867 195.159.176.226 (12 Mar 2017 16:30:15 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 12 Mar 2017 16:30:15 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) Cc: 25122@debbugs.gnu.org, Boruch Baum , Thierry Volpiatto To: npostavs@users.sourceforge.net Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Mar 12 17:30:09 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn6Ni-00058N-K0 for geb-bug-gnu-emacs@m.gmane.org; Sun, 12 Mar 2017 17:30:06 +0100 Original-Received: from localhost ([::1]:47605 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cn6No-0002ra-Nj for geb-bug-gnu-emacs@m.gmane.org; Sun, 12 Mar 2017 12:30:12 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33575) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cn6Nj-0002pt-5w for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 12:30:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cn6Nf-0002gH-96 for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 12:30:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:54600) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cn6Nf-0002g3-5r for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 12:30:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1cn6Ne-0007gJ-VD for bug-gnu-emacs@gnu.org; Sun, 12 Mar 2017 12:30:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 12 Mar 2017 16:30:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 25122 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 25122-submit@debbugs.gnu.org id=B25122.148933616529464 (code B ref 25122); Sun, 12 Mar 2017 16:30:02 +0000 Original-Received: (at 25122) by debbugs.gnu.org; 12 Mar 2017 16:29:25 +0000 Original-Received: from localhost ([127.0.0.1]:52799 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn6N3-0007fA-K4 for submit@debbugs.gnu.org; Sun, 12 Mar 2017 12:29:25 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:63115) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cn6N1-0007ex-IJ for 25122@debbugs.gnu.org; Sun, 12 Mar 2017 12:29:24 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0DFBAA0dsVY/9TkSC1cGgEBAQECAQEBAQgBAQEBg1FBIIEKgxKLT5BcKQGVEYIOKoVyBAICgkBCFgECAQEBAQEBAWsohRYBBAFWIwULCzQSFBgNUoldCA6zaIpcAQEBAQEFAgEgBYs9gxeCCYUZBZxBhnaWBoZik0MmDCWBBCMWCCxBhnMkNQGJbQEBAQ X-IPAS-Result: A0DFBAA0dsVY/9TkSC1cGgEBAQECAQEBAQgBAQEBg1FBIIEKgxKLT5BcKQGVEYIOKoVyBAICgkBCFgECAQEBAQEBAWsohRYBBAFWIwULCzQSFBgNUoldCA6zaIpcAQEBAQEFAgEgBYs9gxeCCYUZBZxBhnaWBoZik0MmDCWBBCMWCCxBhnMkNQGJbQEBAQ X-IronPort-AV: E=Sophos;i="5.36,152,1486443600"; d="scan'208";a="295089021" Original-Received: from 45-72-228-212.cpe.teksavvy.com (HELO pastel.home) ([45.72.228.212]) by smtp.teksavvy.com with ESMTP; 12 Mar 2017 12:29:17 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 9672461876; Sun, 12 Mar 2017 12:29:16 -0400 (EDT) In-Reply-To: <87wpbu7f9i.fsf@users.sourceforge.net> (npostavs's message of "Sun, 12 Mar 2017 10:15:21 -0400") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:130521 Archived-At: > Threads aren't truly parallel. The user can't do anything while the > thread is running. I think the idea is to build the printout while the user is reading the docstring (for example). The loop that prints would have regular `yield` calls so that as soon as not to block other operations. > I wonder if we could just hook this into scrolling somehow? We definitely could (at least, there's no fundamental reason why we can't insert the text from a jit-lock thingy, although modifying the buffer text from jit-lock might trigger some latent bugs). > As mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=21717#8, > it breaks circularity. Try describing this variable: > (defvar circular-list > (let ((l (number-sequence 1 100))) > (setcdr (last l) l) > l) > "A circular list that has problems with (mapc 'pp val).") That's why I think the (mapc #'pp) trick is an interesting observation (it points to a performance bug that should be easy to fix) but is not a solution in itself. Stefan