pdm init -n is slow

[deronnax]

• I have searched the issue tracker and believe that this is not a duplicate.

Steps to reproduce

➜ time pdm init -n -v
Creating a pyproject.toml for PDM...
Project is initialized successfully
pdm init -n -v  1,86s user 1,97s system 45% cpu 8,467 total

Actual behavior

pdm init -n is slow (consistently ~8 seconds).

Expected behavior

pdm init -n should be near instant.

Environment Information

I ran pdm init without the -n to have a better glimpse, and PDM to take an unreasonable amount of time just before the choose
your python question. Then it behaves normally. I believe the search of all python interpreter on my system is what take him most of the time. Since I do a lot of packaging-related stuff, I have many python version on my machine. Here is what pdm init finds in the interactive mode:

Please enter the Python interpreter to use
0. /Users/mathieu/.pyenv/shims/python3 (3.10)
1. /Users/mathieu/.pyenv/shims/python (3.10)
2. /opt/homebrew/bin/python3.12 (3.12)
3. /Users/mathieu/.pyenv/shims/python3.11 (3.11)
4. /opt/homebrew/bin/python3.11 (3.11)
5. /Users/mathieu/.rye/py/cpython@3.11.5/install/bin/python3 (3.11)
6. /Users/mathieu/.pyenv/versions/3.11.5/bin/python3.11 (3.11)
7. /Users/mathieu/.pyenv/versions/pypy3.10-7.3.13/bin/pypy3.10 (3.10)
8. /Users/mathieu/.pyenv/versions/3.10.13/bin/python3.10 (3.10)
9. /Users/mathieu/.pyenv/shims/python3.10 (3.10)
10. /Users/mathieu/.rye/py/cpython@3.10.12/install/bin/python3 (3.10)
11. /Users/mathieu/.pyenv/versions/3.9.17/bin/python3.9 (3.9)
12. /usr/bin/python3 (3.9)
13. /Users/mathieu/.pyenv/versions/3.8.17/bin/python3.8 (3.8)
14. /Users/mathieu/.pyenv/versions/graalpy-22.3.0/bin/python3 (3.8)
15. /Users/mathieu/.pyenv/versions/graalpy-22.3.0/bin/python (3.8)
16. /Users/mathieu/.pyenv/versions/3.7.17/bin/python3.7m (3.7)
17. /Users/mathieu/.pyenv/versions/3.7.17/bin/python3.7 (3.7)
18. /Users/mathieu/.pyenv/versions/3.6.15/bin/python3.6m (3.6)
19. /Users/mathieu/.pyenv/versions/3.6.15/bin/python3.6 (3.6)
20. /opt/homebrew/Cellar/python@3.12/3.12.0/Frameworks/Python.framework/Versions/3.12/bin/python3.12 (3.12)

➜ pdm info && pdm info --env
PDM version:
  2.10.4
Python Interpreter:
  /Users/mathieu/Library/Application Support/pdm/venvs/arnault-poetry-0k1Cy1qo-3.10/bin/python (3.10)
Project Root:
  /tmp/pdmtest
Local Packages:
  
{
  "implementation_name": "cpython",
  "implementation_version": "3.10.13",
  "os_name": "posix",
  "platform_machine": "arm64",
  "platform_release": "23.1.0",
  "platform_system": "Darwin",
  "platform_version": "Darwin Kernel Version 23.1.0: Mon Oct  9 21:28:31 PDT 2023; root:xnu-10002.41.9~6/RELEASE_ARM64_T8112",
  "python_full_version": "3.10.13",
  "platform_python_implementation": "CPython",
  "python_version": "3.10",
  "sys_platform": "darwin"
}