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On my machine, this gives a ~20% improvement in htop process time use with the default config.

Changes in object model: separate class objects to store vtable. Also, nicer UTF-8 display of big numbers.

(for details see https://sourceforge.net/mailarchive/forum.php?thread_name=CAJpkDYeZpwqcWxZ77wq6bMrnhn-KzkU1xAqb3cU0drfnA3n9FQ%40mail.gmail.com&forum_name=htop-general )

* Performance improvements
* Support for splitting CPU meters into two or four columns
  (thanks to Wim Heirman)
* Switch from PLPA, which is now deprecated, to HWLOC.
* Bring back support for native Linux sched_setaffinity,
  so we don't have to use HWLOC where we don't need to.
* Support for typing in user names and column fields in selection panels.

Fix subtree hiding
Fix reading of CPU values in hidden threads
Fix hiding of zombie processes as kernel threads
Remove "debug proc" code
Code cleanup in processElements

simplify processor data accounting (add CPUData structure)
remove Process_clone trick

* BUGFIX: Correct page size calculation for FreeBSD systems
  (thanks to Andrew Paulsen)
* Allow compilation without PLPA on systems that don't support it
  (thanks to Timothy Redaelli)

(thanks to Thorsten Schifferdecker)

contributed by Jonathan Sambrook and Benedikt Bohm

clicking column titles (click again to invert order).
Also, add a consolidated IO kbyte/s column.

Reduces resulting code size.

enabled with the --enable-taskstats flag, which
requires a kernel compiled with taskstats support.
Thanks to Tobias Oetiker!

flag, which requires libncursesw.
Thanks to Sergej Pupykin!

conflicting affinity API of different Linux kernel versions.

Update dates.

Add CPU affinity screen ('a' key).
BUGFIX: Correct display of TPGID field.
Add TGID field.

disable useless code in release builds such as runtime type-checking on
dynamic data structures and process fields that are not being computed,
faster(?) method for verifying the process owner (still need to ensure
correctness), don't destroy and create process objects for hidden kernel
threads over and over. Phew. I shouldn't be doing all this today, but I
could not resist.