Serhiy Storchaka added the comment:
As I understand, the new dict created on every call of function with keyword
arguments. This slow down every such call about 0.1 µsec. This is about
10% of int('42', base=16). In the sum, some programs can slow down to a few
Direct comparison of 3.2 and 3.3 is meaningless because of the influence of
other factors (first of all PEP 393).
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