From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp2 ([2001:41d0:8:6d80::]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id IxmhCaoBY2AzVgEAgWs5BA (envelope-from ) for ; Tue, 30 Mar 2021 12:47:06 +0200 Received: from aspmx1.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp2 with LMTPS id 4KiwAqoBY2BmQgAAB5/wlQ (envelope-from ) for ; Tue, 30 Mar 2021 10:47:06 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id C460924C95 for ; Tue, 30 Mar 2021 12:47:05 +0200 (CEST) Received: from localhost ([::1]:44124 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lRBto-0002Ij-Tb for larch@yhetil.org; Tue, 30 Mar 2021 06:47:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59426) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lRBtc-0002Hc-MO for guix-devel@gnu.org; Tue, 30 Mar 2021 06:46:52 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:35174) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lRBtc-0004Lq-7v; Tue, 30 Mar 2021 06:46:52 -0400 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=53532 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lRBtb-00066s-Mq; Tue, 30 Mar 2021 06:46:52 -0400 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: ilmu Subject: Re: Deep vs Shallow trace: Removing the tradeoff? References: <01A29E7C-0E60-4518-A775-92B6F6A8B816@lepiller.eu> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 10 Germinal an 229 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Date: Tue, 30 Mar 2021 12:46:49 +0200 In-Reply-To: (ilmu@rishi.is's message of "Sun, 28 Mar 2021 23:16:23 +0000") Message-ID: <87blb0hqau.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "guix-devel@gnu.org" Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1617101225; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=pH7D3ofaeQ0UH05XJ/6z8N8ZSJYcB3o/ukqjwTr2514=; b=XrMbixwCpdfPjvIqjFbz08sp032DPyC462pMevxFAN0dIKslT5N7OloRtGaCH2O/0XSsM3 LQq999pTzcOZgNXQNXGpPiy1RGmSZ9l2K537pSkyanyPpKLcH7k9Nwrr8CNHOX/GTYCRwj QDM2WB0oFNv7wHeuNXy+fLGD/qd+VqT/mNDqREe9DgJ7vNrS10R6gavgNpy8d+Y3ac9YFh qIa0I7tGZJpf5RPDGq2vIEY075VTGfFWSEDpnJERLClIN2SBebQCicCB1x8s1MlslRtZuc l08l61mKCTzyA9NSm0YIyTR2AJKzd8qwKpDAz+lXAqLfpTg1hvlJtygO7WRldA== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1617101225; a=rsa-sha256; cv=none; b=BKEvHHPOypwoAajZSr4brKD6Nh4LxaNHKuMVbXhDOk9vN73re5OgeVtcadyubMbmT1mqNf 9ha+CoDlpw+ODkwrMU34DLTibMKW8cLlRXNiivGu2qOKWQYImwfTTCEJa/GO4nrgU+XEtS NlxQnmhvZXF9Xk/KK28vCHv1PvzfhwhmQiUrz1xMMw62mc/ZbYrb5V0DQkfOOI2dkAh9eh COWUhhvZU313jPsI+56fbCTHX2IVTsGw+2H6G9ZrgUV7zz0TAQFv1Ui6GSLFsG9AcTxplR 9EgMFcU2Cm63b7DUbjn2zv+QsCQFxfsC3Vm+GpL3FccaN/ernh3cFtYB6HsmeQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Spam-Score: -1.92 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: C460924C95 X-Spam-Score: -1.92 X-Migadu-Scanner: scn0.migadu.com X-TUID: TZqnptGR8MlO Hi, ilmu skribis: > Early cutoff is a very desirable property that nix does not have (and I a= ssume therefore that neither does guix). The =E2=80=9Cintensional model=E2=80=9D that Julien mentioned, or what the = Nix folks now refer to as =E2=80=9Ccontent-addressed derivations=E2=80=9D, have this earl= y cutoff property. It=E2=80=99s one of the main motivations for this whole endeavor= s. This document shows how Nix folks are working on retrofitting =E2=80=9Ccontent-addressed derivations=E2=80=9D into Nix: https://github.com/tweag/rfcs/blob/cas-rfc/rfcs/0062-content-addressed-pa= ths.md Thanks, Ludo=E2=80=99.