Micro-optimize check_isinstance. #18997
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- If a single type is passed in, save an iteration over a tuple. - Don't compute the type names for the error message unless an error actually occurred. Together, this speeds up `_check_isinstance(int, x=1)` by more than 2-fold, and `_check_isinstance((float, int), x=1)` by a few dozen-%.
dopplershift
approved these changes
Nov 23, 2020
timhoffm
approved these changes
Nov 23, 2020
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actually occurred.
Together, this speeds up
_check_isinstance(int, x=1)by more than2-fold, and
_check_isinstance((float, int), x=1)by a few dozen-%.PR Summary
PR Checklist
pytestpasses).flake8on changed files to check).flake8-docstringsand runflake8 --docstring-convention=all).doc/users/next_whats_new/(follow instructions in README.rst there).doc/api/next_api_changes/(follow instructions in README.rst there).