--layers flag doubles build time

[mostoja]

Description

If run with --layers flag builds take twice as much time, all of it spent on simple COPY commands

Output of rpm -q buildah or apt list buildah:

buildah version 1.35.3 (image-spec 1.1.0, runtime-spec 1.1.0)

Output of buildah info:

{
    "host": {
        "CgroupVersion": "v2",
        "Distribution": {
            "distribution": "fedora",
            "version": "40"
        },
        "MemFree": 26156974080,
        "MemTotal": 33652789248,
        "OCIRuntime": "crun",
        "SwapFree": 0,
        "SwapTotal": 0,
        "arch": "amd64",
        "cpus": 8,
        "hostname": "roboing",
        "kernel": "5.15.0-1060-azure",
        "os": "linux",
        "rootless": false,
        "uptime": "93h 9m 29.18s (Approximately 3.88 days)",
        "variant": ""
    },
    "store": {
        "ContainerStore": {
            "number": 0
        },
        "GraphDriverName": "overlay",
        "GraphOptions": [
            "overlay.imagestore=/var/lib/shared",
            "overlay.mount_program=/usr/bin/fuse-overlayfs",
            "overlay.mountopt=nodev,fsync=0"
        ],
        "GraphRoot": "/blocc/containers/storage",
        "GraphStatus": {
            "Backing Filesystem": "extfs",
            "Native Overlay Diff": "false",
            "Supports d_type": "true",
            "Supports shifting": "true",
            "Supports volatile": "true",
            "Using metacopy": "false"
        },
        "ImageStore": {
            "number": 15
        },
        "RunRoot": "/blocc/containers/run"
    }
}

Output of cat /etc/*release:

NAME="Fedora Linux"
VERSION="40 (Container Image)"
ID=fedora
VERSION_ID=40
VERSION_CODENAME=""
PLATFORM_ID="platform:f40"
PRETTY_NAME="Fedora Linux 40 (Container Image)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:40"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f40/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=40
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=40
SUPPORT_END=2025-05-13
VARIANT="Container Image"
VARIANT_ID=container

[waheedi]

I also have a similar symptom with Ubuntu 22.04 apparently tripled time on my end though, but sadly it also ends with a digest mismatch error after trying to commit image.