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Optimize list.pop() for the common special case of popping off the end.

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More than doubles its speed.
This commit is contained in:
Raymond Hettinger 2004-02-13 18:36:31 +00:00
parent 4bb9540dd6
commit cb3e580ebc
1 changed files with 5 additions and 0 deletions
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5
Objects/listobject.c
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@ -739,6 +739,11 @@ listpop(PyListObject *self, PyObject *args)
return NULL; return NULL;
} }
v = self->ob_item[i]; v = self->ob_item[i];
if (i == self->ob_size - 1) {
if (list_resize(self, self->ob_size - 1) == -1)
return NULL;
return v;
}
Py_INCREF(v); Py_INCREF(v);
if (list_ass_slice(self, i, i+1, (PyObject *)NULL) != 0) { if (list_ass_slice(self, i, i+1, (PyObject *)NULL) != 0) {
Py_DECREF(v); Py_DECREF(v);