Make sure you have checked all steps below.

Prerequisite

• Please consider implementing the feature as a hook script or plugin as a first step.
  • pyenv has some powerful support for plugins and hook scripts. Please refer to Authoring plugins for details and try to implement it as a plugin if possible.
• Please consider contributing the patch upstream to rbenv, since we have borrowed most of the code from that project.
  • We occasionally import the changes from rbenv. In general, you can expect changes made in rbenv will be imported to pyenv too, eventually.
  • Generally speaking, we prefer not to make changes in the core in order to keep compatibility with rbenv.
• My PR addresses the following pyenv issue (if any)
  • Closes pyenv versions --bare --skip-aliases --skip-envs broken by 23bcdebe and includes envs #3415

Description

• Here are some details about my PR

Fixes the regression by splitting the corner-cutting code for rehash into a dedicated branch.

Further saves some time:

exec "$(pyenv init - zsh)"
<empty fixture>
comparison (median)
  upstream: 101.1 ms
  working: 95.3 ms
  delta:    5.8 ms faster (5%)

<standard fixture>
comparison (median)
  upstream: 160.0 ms
  working: 116.3 ms
  delta:    43.7 ms faster (27%)

<large fixture>
comparison (median)
  upstream: 283.1 ms
  working: 150.9 ms
  delta:    132.2 ms faster (46%)

--------------------------------
exec "$(pyenv init - bash)"
<empty fixture>
comparison (median)
  upstream: 126.2 ms
  working: 118.5 ms
  delta:    7.6 ms faster (6%)

<standard fixture>
comparison (median)
  upstream: 351.0 ms
  working: 352.9 ms
  delta:    1.8 ms slower (0%)

<large fixture>
comparison (median)
  upstream: 473.2 ms
  working: 387.9 ms
  delta:    85.3 ms faster (18%)

Tests

• My PR adds the following unit tests (if any)
  for the new switch