[Bug 1965451] Re: C++ performance got worse going from Ubuntu 20 to Ubuntu 21

[Launchpad Bug Tracker]

[Expired for gcc-11 (Ubuntu) because there has been no activity for 60
days.]

** Changed in: gcc-11 (Ubuntu)
       Status: Incomplete => Expired

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Title:
  C++ performance got worse going from Ubuntu 20 to Ubuntu 21

Status in gcc-11 package in Ubuntu:
  Expired

Bug description:
  This is not a bug, more of a degradation of performance report.

  Going from Ubuntu 20 to Ubuntu 21 (and same on Ubuntu 22 pre-release),
  I noticed that C++ performance got worse, while it stayed the same for
  pypy:

  Ubuntu 21:
  pypy	1.419s	1.387s	8.527%	2.469%
  c++	1.843s	1.719s	8.935%	2.465%

  Ubuntu 20:
  PyPy	1.410s	1.389s	8.463%	2.290%
  C++	1.588s	1.507s	8.781%	2.284%

  details:
  https://www.frisky.world/2022/03/what-happened-to-c-performance-going.html

  software I use:
  https://github.com/pepe78/python-performance

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