From owner-freebsd-bugs@freebsd.org Mon Dec 23 10:55:20 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B00591EC512 for ; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 47hGTh4J3zz4Vh0 for ; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 9196A1EC511; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 903AA1EC510 for ; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47hGTh34PWz4Vgy for ; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 64F35EC84 for ; Mon, 23 Dec 2019 10:55:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id xBNAtKBD002753 for ; Mon, 23 Dec 2019 10:55:20 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id xBNAtKTr002752 for bugs@FreeBSD.org; Mon, 23 Dec 2019 10:55:20 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 242828] diff -rq still does full file comparison Date: Mon, 23 Dec 2019 10:55:20 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: ml@netfence.it X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Dec 2019 10:55:20 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D242828 Bug ID: 242828 Summary: diff -rq still does full file comparison Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: ml@netfence.it In a task of mine I often have to "diff -rq" two directories which have ~75= 000 files; those files are usually very similar, with a only a few lines differ= ing. Some of them have up to 25M lines. On 11.3 (which feature GNU diff), the whole process usually take a few minu= tes. On 12.1 (which feature BSD diff), I was never able to complete it: most of = the times I just interrupted it after some hours, but in a case it did crash the whole system due to an out of swap situation (16GB RAM + 32GB swap!!!). I tried to find out the reason with gdb and I am convinced that: _ 11.3, as soon as it sees a file differs, will move to the next one; _ OTOH, 12.1 will still compute the whole diff set for that file, although = it just have to print "File x and y differ". Of course, there's a workaround as simple as installing textproc/diffutils = and using "gdiff" instead of "diff". --=20 You are receiving this mail because: You are the assignee for the bug.=