| import multiprocessing |
| import sys |
| |
| def max_parallelism() -> int: |
| cpu_count = multiprocessing.cpu_count() |
| if sys.platform == 'win32': |
| # On Python 3 on Windows, using >= MAXIMUM_WAIT_OBJECTS processes |
| # causes a crash in the multiprocessing module. Whilst this enum |
| # can technically have any value, it is usually 64. For safety, |
| # restrict manifest regeneration to 56 processes on Windows. |
| # |
| # See https://bugs.python.org/issue26903 and https://bugs.python.org/issue40263 |
| cpu_count = min(cpu_count, 56) |
| return cpu_count |
