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Micro-optimization for list_contains. Factored double if test

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out of the loop.
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Raymond Hettinger 2002-09-05 14:23:49 +00:00
parent 63857a454d
commit aae5999b44
1 changed files with 7 additions and 8 deletions
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9
Objects/listobject.c
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@ -320,16 +320,15 @@ list_length(PyListObject *a)
static int static int
list_contains(PyListObject *a, PyObject *el) list_contains(PyListObject *a, PyObject *el)
{ {
int i; int i, cmp;
for (i = 0; i < a->ob_size; ++i) { for (i = 0, cmp = 0 ; cmp == 0 && i < a->ob_size; ++i)
int cmp = PyObject_RichCompareBool(el, PyList_GET_ITEM(a, i), cmp = PyObject_RichCompareBool(el, PyList_GET_ITEM(a, i),
Py_EQ); Py_EQ);
if (cmp > 0) if (cmp > 0)
return 1; return 1;
else if (cmp < 0) if (cmp < 0)
return -1; return -1;
}
return 0; return 0;
} }