New submission from Jim Nasby:
In PyTuple_New, if the new tuple won't go on the free_list:
/* Check for overflow */
if (nbytes / sizeof(PyObject *) != (size_t)size ||
(nbytes > PY_SSIZE_T_MAX - sizeof(PyTupleObject) -
sizeof(PyObject *)))
{
return PyErr_NoMemory();
}
nbytes += sizeof(PyTupleObject) - sizeof(PyObject *);
nbytes is never used after the overflow check, so the last addition is a waste.
----------
messages: 254367
nosy: Jim Nasby
priority: normal
severity: normal
status: open
title: Useless addition in PyTuple_New
type: performance
versions: Python 3.6
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Python tracker <[email protected]>
<http://bugs.python.org/issue25587>
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