STINNER Victor <vstin...@python.org> added the comment:
IMO 1.01x slower on a *microbenchmark* is not significant so it's ok. Thanks
for checking.
You pass a *type to isinstance() in bench_isinstance_check.py. You should pass
*an instance* instead. Like (complete the (...) ;-)):
runner.timeit(name="bench _abc_instancecheck",
stmt="isinstance(obj, T)",
setup = """from abc import ABC (...) obj = (1, 2, 3)""")
Would you mind to fix your microbenchmark and re-run it?
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue40077>
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