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Severity: important Hi, I'm not sure whether this is the correct mailing list, but I can’t determine a certain package for this problem ... After upgrading from Debian Bookworm to Trixie I can notice that setting up an arm64 rootfs in a chroot environment became extremely slow. I tried multiple host systems (WSL and Ubuntu) and both QEMU versions (backported version from trixie) on bookworm. The results below are the same. Trixie: $ sudo debootstrap --arch arm64 --components=main,contrib,non-free,non-free-firmware trixie trixie $ pushd trixie/ $ sudo mount -t proc /proc proc/ $ sudo mount -t sysfs /sys sys/ $ sudo mount -t devpts /dev/pts dev/pts/ $ popd $ sudo chroot trixie/ $ time apt update real 0m29.622s user 0m29.397s sys 0m0.100s $ time apt install python3-virtualenv --no-install-recommends real 1m30.492s user 1m31.017s sys 0m0.942s $ virtualenv /opt/trixie && source /opt/trixie/bin/activate $ time pip install --only-binary=:all: Jinja2 Werkzeug Flask debugpy gunicorn real 1m12.281s user 1m11.051s sys 0m0.260s Bookworm: $ sudo debootstrap --arch arm64 --components=main,contrib,non-free,non-free-firmware bookworm bookworm $ pushd bookworm/ $ sudo mount -t proc /proc proc/ $ sudo mount -t sysfs /sys sys/ $ sudo mount -t devpts /dev/pts dev/pts/ $ popd $ sudo chroot bookworm/ $ time apt update real 0m5.977s user 0m5.727s sys 0m0.167s $ time apt install python3-virtualenv --no-install-recommends real 0m20.539s user 0m18.112s sys 0m0.800s $ virtualenv /opt/bookworm && source /opt/bookworm/bin/activate $ time pip install --only-binary=:all: Jinja2 Werkzeug Flask debugpy gunicorn real 0m10.373s user 0m9.387s sys 0m0.160s I’m not sure, but it seems everything related to IO (network stuff and unpacking via apt or pip) is much slower. I think this problem is similar or the same as for Bug #1071369, but the scope is not just python-venv/python-minimal as e.g., apt is also slower. -- System Information: Debian Release: bookworm/sid APT prefers jammy-updates APT policy: (500, 'jammy-updates'), (500, 'jammy-security'), (500, 'jammy'), (100, 'jammy-backports') Architecture: amd64 (x86_64) Kernel: Linux 5.15.167.4-microsoft-standard-WSL2 (SMP w/24 CPU threads) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system |