[issue30907] speed up comparisons to self for built-in containers
Serhiy Storchaka
report at bugs.python.org
Fri Jul 14 01:00:57 EDT 2017
Serhiy Storchaka added the comment:
First, few comments about the code.
1) The condition "a == b" is enough. No need to test "PyDict_CheckExact(a)" and like.
2) This fast path can be used only for Py_EQ and Py_NE. For other operations it can change the behavior.
This is common approach of implementing operator== on C++. Unless comparing objects is trivial the implementation of operator== almost always starts with comparing pointers. In Python the overhead of calling methods and comparing objects is larger than in C++ and I expect that the relative overhead of one additional pointer comparison is smaller.
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nosy: +serhiy.storchaka
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<http://bugs.python.org/issue30907>
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