argparse currently defers importing copy, difflib, shutil, textwrap, and warnings using inline imports, while importing re and gettext eagerly at module scope. I think these can safely be replaced with module-level explicit lazy imports, which will make the module’s dependencies more readable and reduce the cost of a bare import argparse.
On my machine, preliminary release-build measurements using -S -X importtime show the median cumulative import time for argparse decreasing by approximately 67%, from 4,792 µs to 1,595 µs across 15 alternating runs.
Linked PRs
argparse currently defers importing copy, difflib, shutil, textwrap, and warnings using inline imports, while importing re and gettext eagerly at module scope. I think these can safely be replaced with module-level explicit lazy imports, which will make the module’s dependencies more readable and reduce the cost of a bare import argparse.
On my machine, preliminary release-build measurements using -S -X importtime show the median cumulative import time for argparse decreasing by approximately 67%, from 4,792 µs to 1,595 µs across 15 alternating runs.
Linked PRs