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  1. From Python 3.3 to today: ending 15 years of subprocess polling

    Featured

    Replacing subprocess.Popen.wait()’s busy-loop with an event-driven model, in psutil then upstream CPython

  2. Detecting memory leaks in C extensions with psutil and psleak

    Featured

    psutil 7.2.0 peeks into the native allocator, spotting leaks RSS can’t see

  3. Wheels for free-threaded Python now available

    Unlocking pip install psutil for no-GIL Python

  4. Speeding up pytest startup

    Trimming heavy imports and plugins: 0.42s → 0.30s (~28%)

  5. Letting go of Python 2.7

    Featured

    Downloads fell from ~8% to 0.36% in three years; psutil 7.0.0 ends support

  6. Removing Process.memory_maps() on macOS

    A segfault I couldn’t fix, and the API removal that followed

  7. Announcing psutil 5.6.0

    5.6.0 adds parents(), brings several Windows improvements, and removes memory_maps() on macOS

  8. AIX support

    psutil 5.4.0 gets an IBM port, contributed by Arnon Yaari

  9. Improved process_iter()

    5.3.0 adds attrs and ad_value parameters to process_iter(), letting you pre-fetch attributes in one shot

  10. Fixing Unicode across Python 2 and 3

    How psutil 5.3.0 got non-ASCII strings right on both Python 2 and Python 3.

  11. Sensors: temperatures, battery, CPU frequency

    psutil 5.1.0 introduces sensors_temperatures(), sensors_battery() and cpu_freq()

  12. Making psutil twice as fast

    Featured

    New Process.oneshot(), caching shared syscalls and halving the cost of multi-field queries

  13. Windows services support

    psutil 4.2.0 introduces win_service_iter() and win_service_get()

  14. NetBSD support

    Completing the BSD trio alongside FreeBSD and OpenBSD

  15. Real process memory and environ in Python

    psutil 4.0.0 exposes USS, the memory that would actually be freed on process exit + Process.environ()

  16. OpenBSD support

    psutil 3.3.0 now runs on OpenBSD, sharing most of the implementation with FreeBSD

  17. Reimplementing ifconfig in Python

    Featured

    psutil 3.0 introduces net_if_addrs() and net_if_stats()

  18. Proper zombie process handling

    Proper handling of zombies via new ZombieProcess exception

  19. Announcing psutil 2.0

    A major rewrite with breaking API changes

  20. Porting your code to psutil 2.0

    A migration guide for the breaking API changes in psutil 2.0