Bug#1117500: marked as done (APT package installation is noticeably slower compared to previous versions (Debian 13))

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Your message dated Sun, 7 Jun 2026 04:27:28 +0200
with message-id <[email protected]>
and subject line Re: Bug#1117500: APT package installation is noticeably sl=
ower compared to previous versions (Debian 13)
has caused the Debian Bug report #1117500,
regarding APT package installation is noticeably slower compared to previou=
s versions (Debian 13)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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1117500: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D1117500
Debian Bug Tracking System
Contact [email protected] with problems

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From: bayram karahan <[email protected]>
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Message-ID: <CAG5ow=mLFyMu3du_Qam4FhfX14vVGnFU-0w0dEeeaVbXxh1iZw@mail.gmail.com>
Subject: APT package installation is noticeably slower compared to previous
 versions (Debian 13)
To: [email protected]
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Package: apt
Version: 3.0.0~alpha3
Severity: normal
Tags: trixie performance

Subject: APT package installation is noticeably slower compared to previous
versions (Debian 13)

Hello Debian team,

On Debian 13 (Trixie, Testing) with the new APT package manager (3.x
series), package installation performance has significantly regressed
compared to previous versions.

Installing a simple package used to take around 20=E2=80=9330 seconds with =
older
APT releases (e.g., 2.6.x in Debian 12), but now the same operation often
takes 2=E2=80=933 minutes. This slowdown is especially noticeable on slower=
 disks
or network-based installs.

Observed behavior:
- The =E2=80=9CDownloading=E2=80=9D phase runs at normal speed.
- The =E2=80=9CConfiguring packages=E2=80=9D or =E2=80=9CSetting up=E2=80=
=9D phases take much longer.
- CPU usage remains low (around 5=E2=80=9310%).
- Disk I/O is minimal.
- It seems APT or dpkg triggers are spending excessive time in internal
processing.

**Expected behavior:**
Package installation should complete at speeds similar to previous APT
versions.
If this is a performance regression, optimization would improve user
experience.

**System information:**
- Debian 13 (Trixie, Testing)
- APT version: 3.0.0~alpha3
- Desktop: Cinnamon
- Disk: SSD
- CPU: x86_64, 8 cores
- Network: stable and fast (no download slowdown)

This slowdown negatively affects interactivity and user experience,
especially for frequent package operations.

Thank you

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<div dir=3D"ltr">Package: apt<br>Version: 3.0.0~alpha3<br>Severity: normal<=
br>Tags: trixie performance<br><br>Subject: APT package installation is not=
iceably slower compared to previous versions (Debian 13)<br><br>Hello Debia=
n team,<br><br>On Debian 13 (Trixie, Testing) with the new APT package mana=
ger (3.x series), package installation performance has significantly regres=
sed compared to previous versions.<br><br>Installing a simple package used =
to take around 20=E2=80=9330 seconds with older APT releases (e.g., 2.6.x i=
n Debian 12), but now the same operation often takes 2=E2=80=933 minutes. T=
his slowdown is especially noticeable on slower disks or network-based inst=
alls.<br><br>Observed behavior:<br>- The =E2=80=9CDownloading=E2=80=9D phas=
e runs at normal speed.<br>- The =E2=80=9CConfiguring packages=E2=80=9D or =
=E2=80=9CSetting up=E2=80=9D phases take much longer.<br>- CPU usage remain=
s low (around 5=E2=80=9310%).<br>- Disk I/O is minimal.<br>- It seems APT o=
r dpkg triggers are spending excessive time in internal processing.<br><br>=
**Expected behavior:**<br>Package installation should complete at speeds si=
milar to previous APT versions. =C2=A0<br>If this is a performance regressi=
on, optimization would improve user experience.<br><br>**System information=
:**<br>- Debian 13 (Trixie, Testing)<br>- APT version: 3.0.0~alpha3<br>- De=
sktop: Cinnamon<br>- Disk: SSD<br>- CPU: x86_64, 8 cores<br>- Network: stab=
le and fast (no download slowdown)<br><br>This slowdown negatively affects =
interactivity and user experience, especially for frequent package operatio=
ns.<br><br>Thank you</div>

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Date: Sun, 7 Jun 2026 04:27:28 +0200
From: Guillem Jover <[email protected]>
To: [email protected]
Cc: bayram karahan <[email protected]>
Subject: Re: Bug#1117500: APT package installation is noticeably slower
 compared to previous versions (Debian 13)
Message-ID: <[email protected]>
References: <CAG5ow=mLFyMu3du_Qam4FhfX14vVGnFU-0w0dEeeaVbXxh1iZw@mail.gmail.com>
 <[email protected]>
 <CAG5ow=mLFyMu3du_Qam4FhfX14vVGnFU-0w0dEeeaVbXxh1iZw@mail.gmail.com>
 <[email protected]>
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In-Reply-To: <[email protected]>

Hi!

On Thu, 2025-10-09 at 08:38:27 +0200, Guillem Jover wrote:
> Control: tag -1 unreproducible moreinfo
> 
> On Mon, 2025-10-06 at 21:00:47 +0200, Julian Andres Klode wrote:
> > On Mon, Oct 06, 2025 at 09:54:12PM +0300, bayram karahan wrote:
> > > Package: apt
> > > Version: 3.0.0~alpha3
> > > Severity: normal
> > > Tags: trixie performance
> 
> > > On Debian 13 (Trixie, Testing) with the new APT package manager (3.x
> > > series), package installation performance has significantly regressed
> > > compared to previous versions.
> > > 
> > > Installing a simple package used to take around 20–30 seconds with older
> > > APT releases (e.g., 2.6.x in Debian 12), but now the same operation often
> > > takes 2–3 minutes. This slowdown is especially noticeable on slower disks
> > > or network-based installs.
> > 
> > What is a simple package?
> 
> Yes, please.
> 
> > > Observed behavior:
> > > - The “Downloading” phase runs at normal speed.
> > > - The “Configuring packages” or “Setting up” phases take much longer.
> > 
> > These steps are inside of dpkg, so I reassign accordingly.
> > 
> > I do not think there is anything actionable here, and it's likely a
> > problem with your system.
> 
> What is the actual output from the commands where it seems to be
> taking too long? It's hard to know what to do without at least that,
> or a way to reproduce this.
> 
> > > - CPU usage remains low (around 5–10%).
> > > - Disk I/O is minimal.
> > > - It seems APT or dpkg triggers are spending excessive time in internal
> > > processing.
> > 
> > Perhaps your disk is failing? If it's not blocked on CPU then it will be
> > blocked on I/O, but not necessarily writes but ordering of syncs - you
> > will not see them associated as writes with the process, I'm not sure
> > if you see those at all as I/O in monitoring.
> > 
> > It's plausible dpkg added some extra fsync calls this cycle, but I
> > can't say for sure.
> 
> To me this seems like some package might be doing something heavy in
> its maintainer scripts (either configure or triggers). There should be
> no new fsync() involved there.
> 
> Lacking the necessary information asked above, I'll be closing this
> report in a bit.

Closing this now.

Thanks,
Guillem
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