Throughput reported by 'podman push' is too high

[syedriko]

Issue Description

When pushing an image to quay.io, podman reports unrealistic throughput numbers:

$ podman push quay.io/foo/bar:zoo
Getting image source signatures
Copying blob 40d0b5be75be done   |
Copying blob e2604a9fd705 [==================================>---] 86.0MiB / 92.9MiB | 350.0 MiB/s
Copying blob 2e29575f0513 [==========================>-----------] 94.0MiB / 130.6MiB | 384.9 MiB/s

I've seen it report up 1.1 GiB/s, but failed to capture. My upload bandwidth is 20 Mbps as reported by https://speedtest.xfinity.com/results so these numbers are not realistic, something is off with arithmetic there.

Steps to reproduce the issue

Steps to reproduce the issue

1. Measure upload bandwidth
2. Push a somewhat large, > 100 MB, image, to an image registry, watch the throughput as reported by podman.
3. Compare the throughput as reported by podman to the available upload bandwidth

Describe the results you received

podman reported image upload speed of 350.0 MiB/s

Describe the results you expected

podman reports image upload speed within my cable modem's upload bandwidth

podman info output

$ podman info
host:
  arch: amd64
  buildahVersion: 1.32.0
  cgroupControllers:
  - cpu
  - io
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.7-3.fc39.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.7, commit: '
  cpuUtilization:
    idlePercent: 95.32
    systemPercent: 0.66
    userPercent: 4.02
  cpus: 16
  databaseBackend: boltdb
  distribution:
    distribution: fedora
    variant: workstation
    version: "39"
  eventLogger: journald
  freeLocks: 2048
  hostname: fedora
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 6.5.10-300.fc39.x86_64
  linkmode: dynamic
  logDriver: journald
  memFree: 10782474240
  memTotal: 67100966912
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.8.0-1.fc39.x86_64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.8.0
    package: netavark-1.8.0-2.fc39.x86_64
    path: /usr/libexec/podman/netavark
    version: netavark 1.8.0
  ociRuntime:
    name: crun
    package: crun-1.11.1-1.fc39.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 1.11.1
      commit: 1084f9527c143699b593b44c23555fb3cc4ff2f3
      rundir: /run/user/1000/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +LIBKRUN +WASM:wasmedge +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-0^20231004.gf851084-1.fc39.x86_64
    version: |
      pasta 0^20231004.gf851084-1.fc39.x86_64
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: false
    path: /run/user/1000/podman/podman.sock
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.2-1.fc39.x86_64
    version: |-
      slirp4netns version 1.2.2
      commit: 0ee2d87523e906518d34a6b423271e4826f71faf
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.3
  swapFree: 8587571200
  swapTotal: 8589930496
  uptime: 4h 52m 31.00s (Approximately 0.17 days)
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
  - quay.io
store:
  configFile: /home/syedriko/.config/containers/storage.conf
  containerStore:
    number: 0
    paused: 0
    running: 0
    stopped: 0
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /home/syedriko/.local/share/containers/storage
  graphRootAllocated: 1022488477696
  graphRootUsed: 346458644480
  graphStatus:
    Backing Filesystem: btrfs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Supports shifting: "false"
    Supports volatile: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 67
  runRoot: /run/user/1000/containers
  transientStore: false
  volumePath: /home/syedriko/.local/share/containers/storage/volumes
version:
  APIVersion: 4.7.0
  Built: 1695838680
  BuiltTime: Wed Sep 27 14:18:00 2023
  GitCommit: ""
  GoVersion: go1.21.1
  Os: linux
  OsArch: linux/amd64
  Version: 4.7.0

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

No

Additional environment details

Additional environment details

Additional information

Additional information like issue happens only occasionally or issue happens with a particular architecture or on a particular setting