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This is the fastest I could get on Intel GCC. I kept the memset() in to clear 

the newly created tuples, but tuples added in the freelist are now cleared in
tupledealloc already (which is very cheap, because we are already
Py_XDECREF'ing all elements anyway).

Python should have a standard Py_ZAP macro like ZAP in pystate.c.
This commit is contained in:
Armin Rigo 2004-03-21 20:27:49 +00:00
parent abce8a681c
commit 56716150e6
1 changed files with 11 additions and 4 deletions
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15
Objects/tupleobject.c
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@ -68,9 +68,8 @@ PyTuple_New(register int size)
op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size); op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
if (op == NULL) if (op == NULL)
return NULL; return NULL;
memset(op->ob_item, 0, size*sizeof(PyObject*));
} }
for (i=0; i < size; i++)
op->ob_item[i] = NULL;
#if MAXSAVESIZE > 0 #if MAXSAVESIZE > 0
if (size == 0) { if (size == 0) {
free_tuples[0] = op; free_tuples[0] = op;
@ -165,19 +164,27 @@ tupledealloc(register PyTupleObject *op)
Py_TRASHCAN_SAFE_BEGIN(op) Py_TRASHCAN_SAFE_BEGIN(op)
if (len > 0) { if (len > 0) {
i = len; i = len;
while (--i >= 0)
Py_XDECREF(op->ob_item[i]);
#if MAXSAVESIZE > 0 #if MAXSAVESIZE > 0
if (len < MAXSAVESIZE && if (len < MAXSAVESIZE &&
num_free_tuples[len] < MAXSAVEDTUPLES && num_free_tuples[len] < MAXSAVEDTUPLES &&
op->ob_type == &PyTuple_Type) op->ob_type == &PyTuple_Type)
{ {
while (--i >= 0) {
PyObject* o = op->ob_item[i];
if (o != NULL) {
op->ob_item[i] = NULL;
Py_DECREF(o);
}
}
op->ob_item[0] = (PyObject *) free_tuples[len]; op->ob_item[0] = (PyObject *) free_tuples[len];
num_free_tuples[len]++; num_free_tuples[len]++;
free_tuples[len] = op; free_tuples[len] = op;
goto done; /* return */ goto done; /* return */
} }
else
#endif #endif
while (--i >= 0)
Py_XDECREF(op->ob_item[i]);
} }
op->ob_type->tp_free((PyObject *)op); op->ob_type->tp_free((PyObject *)op);
done: done: