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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
Subject: Re: bug#78194: `guix pull --list-generations' is extremely slow
In-Reply-To: <87h61nywww.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22'?=
=?utf-8?Q?s?= message of "Wed, 14 May 2025 18:33:35 +0200")
References: <87msbw4a4m.fsf@HIDDEN> <87h61nywww.fsf@HIDDEN>
Date: Wed, 14 May 2025 22:28:37 +0200
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Cc: 78194 <at> debbugs.gnu.org, Ian Eure <ian@HIDDEN>
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Ludovic Court=C3=A8s <ludo@HIDDEN> writes:
> Because for each pair of generations, it shows the corresponding news
> entries (as per =E2=80=98guix pull --news=E2=80=99), and that part is qui=
te expensive
> because it involves a Git log traversal.
>
> I think we should (1) optimize the news code (that=E2=80=99s
> =E2=80=98channel-news-for-commit=E2=80=99), and (2) if that=E2=80=99s not=
enough consider
> keeping it off by default in =E2=80=98guix pull --list-generations=E2=80=
=99.
That turned out to be easier than I thought, see
<https://issues.guix.gnu.org/78432>, which makes it 10=E2=80=9320x faster.
Ludo=E2=80=99.
bug-guix@HIDDEN:bug#78194; Package guix.
Full text available.Received: (at 78194) by debbugs.gnu.org; 14 May 2025 17:04:11 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed May 14 13:04:11 2025 Received: from localhost ([127.0.0.1]:44771 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1uFFWc-0004oe-Sn for submit <at> debbugs.gnu.org; Wed, 14 May 2025 13:04:11 -0400 Received: from hera.aquilenet.fr ([185.233.100.1]:47836) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <ludo@HIDDEN>) id 1uFFWY-0004mc-C4 for 78194 <at> debbugs.gnu.org; Wed, 14 May 2025 13:04:07 -0400 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id B9F20E4C; Wed, 14 May 2025 19:03:57 +0200 (CEST) X-Virus-Scanned: Debian amavis at hera.aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavis, port 10024) with ESMTP id 5mJSX86gdgVn; Wed, 14 May 2025 19:03:57 +0200 (CEST) Received: from ribbon (91-160-117-201.subs.proxad.net [91.160.117.201]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 0A88EE49; Wed, 14 May 2025 19:03:57 +0200 (CEST) From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN> To: Ian Eure <ian@HIDDEN> Subject: Re: bug#78194: `guix pull --list-generations' is extremely slow In-Reply-To: <87msbw4a4m.fsf@HIDDEN> (Ian Eure's message of "Thu, 01 May 2025 08:35:21 -0700") References: <87msbw4a4m.fsf@HIDDEN> Date: Wed, 14 May 2025 18:33:35 +0200 Message-ID: <87h61nywww.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.7 (/) X-Debbugs-Envelope-To: 78194 Cc: 78194 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.3 (/) Hi, Ian Eure <ian@HIDDEN> writes: > I=E2=80=99ve been frustrated by this before, but decided to measure thing= s: > > `guix home list-generations' takes 3.535s to list 28 items. > `guix system list-generations' takes 1.406s to list 35 items. > `guix pull --list-generations' takes 232.599s to list 41 items. > > Why is `guix pull --list-generations' >100x slower than `guix system > list-generations'? Because for each pair of generations, it shows the corresponding news entries (as per =E2=80=98guix pull --news=E2=80=99), and that part is quite= expensive because it involves a Git log traversal. I think we should (1) optimize the news code (that=E2=80=99s =E2=80=98channel-news-for-commit=E2=80=99), and (2) if that=E2=80=99s not e= nough consider keeping it off by default in =E2=80=98guix pull --list-generations=E2=80=99. Thoughts? Ludo=E2=80=99.
bug-guix@HIDDEN:bug#78194; Package guix.
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Thu, 1 May 2025 11:35:26 -0400 (EDT) From: Ian Eure <ian@HIDDEN> To: bug-guix@HIDDEN Subject: `guix pull --list-generations' is extremely slow User-Agent: mu4e 1.12.9; emacs 29.4 Date: Thu, 01 May 2025 08:35:21 -0700 Message-ID: <87msbw4a4m.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=202.12.124.144; envelope-from=ian@HIDDEN; helo=fout-b1-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.7 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.3 (/) I=E2=80=99ve been frustrated by this before, but decided to measure=20 things: `guix home list-generations' takes 3.535s to list 28 items. `guix system list-generations' takes 1.406s to list 35 items. `guix pull --list-generations' takes 232.599s to list 41 items. Why is `guix pull --list-generations' >100x slower than `guix=20 system list-generations'? Thanks, -- Ian
Ian Eure <ian@HIDDEN>:bug-guix@HIDDEN.
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