From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: Gnus: caching message headers? Date: Mon, 07 Sep 2020 10:53:19 -0700 Message-ID: <87r1rdqxrk.fsf@ericabrahamsen.net> References: <874ko9sgcn.fsf@ericabrahamsen.net> <87v9gpqyir.fsf@ericabrahamsen.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16034"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:h2UTlJGx642ZDOXv7HKySw6WFck= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Sep 07 19:58:14 2020 Return-path: Envelope-to: geh-help-gnu-emacs@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 1kFLPB-000433-8f for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 07 Sep 2020 19:58:13 +0200 Original-Received: from localhost ([::1]:39010 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kFLPA-0000VA-BA for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 07 Sep 2020 13:58:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:36088) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kFLKZ-0001Cj-J3 for help-gnu-emacs@gnu.org; Mon, 07 Sep 2020 13:53:27 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:35880 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kFLKX-0000uz-VD for help-gnu-emacs@gnu.org; Mon, 07 Sep 2020 13:53:27 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kFLKW-0008NH-DC for help-gnu-emacs@gnu.org; Mon, 07 Sep 2020 19:53:24 +0200 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/07 11:25:51 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:123987 Archived-At: Gregory Heytings via Users list for the GNU Emacs text editor writes: >>> I'm clearly not an expert, but would it not be enough to save and >>> retrieve the contents of nntp-server-buffer in >>> nnimap-retrieve-headers? Or are you thinking about a more generic >>> solution that would work with all backends? >> >> We could do something ad-hoc for nnimap, but yes I'm thinking of >> something more generic. All the header data (what's used to create >> the Summary display) is held in variables that are local to the >> Summary buffer, so in principle there's no reason we couldn't just >> leave the local data in place when we leave the buffer. There are >> plenty of obstacles to making it work correctly, but in principle I >> don't see why not. >> > > I would be happy with an ad-hoc solution for nnimap, which I suppose > is the most used backend these days (but I could be wrong). In fact I > wasn't thinking of just leaving the local data in place when the > summary buffer is left (which could eat a lot of memory), but instead > to store them permanently in a cache on disk, and to read that file > again instead of doing a "UID FETCH" on the server. Check out wgreenhouse's suggestion!