#18969 Evaluate performance of using Pypy to run Pants Issue created by stuhood I evaluated running Pants under

pypy

but (likely due to the fact that

pyo3

does not have support for using the HPy API, so

pypy

needs to emulate the CPython API), it was a slower than CPython:

Benchmark #1: git co main && PY=/Users/stuhood/.pyenv/versions/3.9.12/bin/python3.9 ./pants --no-pantsd dependencies ::
  Time (mean ± σ):     50.203 s ±  0.341 s    [User: 53.337 s, System: 9.651 s]
  Range (min … max):   49.757 s … 50.897 s    10 runs

Benchmark #2: git co stuhood/pypy && PY=/Users/stuhood/.pyenv/versions/pypy3.9-7.3.11/bin/pypy3.9 ./pants --no-pantsd dependencies ::
  Time (mean ± σ):     80.154 s ±  0.727 s    [User: 77.489 s, System: 10.779 s]
  Range (min … max):   78.745 s … 80.993 s    10 runs

Summary
  'git co main && PY=/Users/stuhood/.pyenv/versions/3.9.12/bin/python3.9 ./pants --no-pantsd dependencies ::' ran
    1.60 ± 0.02 times faster than 'git co stuhood/pypy && PY=/Users/stuhood/.pyenv/versions/pypy3.9-7.3.11/bin/pypy3.9 ./pants --no-pantsd dependencies ::'

The changes are tagged here for posterity: https://github.com/stuhood/pants/commits/stuhood/pypy pantsbuild/pants