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Speedup the inner loops for dropwhile(), islice(), ifilter(), and

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ifilterfalse().
This commit is contained in:
Raymond Hettinger 2004-03-17 04:27:44 +00:00
parent bdda9f389a
commit 0faa1ca51d
1 changed files with 17 additions and 9 deletions
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26
Modules/itertoolsmodule.c
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@ -835,10 +835,12 @@ dropwhile_next(dropwhileobject *lz)
PyObject *item, *good;
PyObject *it = lz->it;
long ok;
PyObject *(*iternext)(PyObject *);
assert(PyIter_Check(it));
iternext = *it->ob_type->tp_iternext;
for (;;) {
assert(PyIter_Check(it));
item = (*it->ob_type->tp_iternext)(it);
item = iternext(it);
if (item == NULL)
return NULL;
if (lz->start == 1)
@ -1170,10 +1172,12 @@ islice_next(isliceobject *lz)
PyObject *item;
PyObject *it = lz->it;
long oldnext;
PyObject *(*iternext)(PyObject *);
assert(PyIter_Check(it));
iternext = *it->ob_type->tp_iternext;
while (lz->cnt < lz->next) {
assert(PyIter_Check(it));
item = (*it->ob_type->tp_iternext)(it);
item = iternext(it);
if (item == NULL)
return NULL;
Py_DECREF(item);
@ -1182,7 +1186,7 @@ islice_next(isliceobject *lz)
if (lz->stop != -1 && lz->cnt >= lz->stop)
return NULL;
assert(PyIter_Check(it));
item = (*it->ob_type->tp_iternext)(it);
item = iternext(it);
if (item == NULL)
return NULL;
lz->cnt++;
@ -1783,10 +1787,12 @@ ifilter_next(ifilterobject *lz)
PyObject *item;
PyObject *it = lz->it;
long ok;
PyObject *(*iternext)(PyObject *);
assert(PyIter_Check(it));
iternext = *it->ob_type->tp_iternext;
for (;;) {
assert(PyIter_Check(it));
item = (*it->ob_type->tp_iternext)(it);
item = iternext(it);
if (item == NULL)
return NULL;
@ -1932,10 +1938,12 @@ ifilterfalse_next(ifilterfalseobject *lz)
PyObject *item;
PyObject *it = lz->it;
long ok;
PyObject *(*iternext)(PyObject *);
assert(PyIter_Check(it));
iternext = *it->ob_type->tp_iternext;
for (;;) {
assert(PyIter_Check(it));
item = (*it->ob_type->tp_iternext)(it);
item = iternext(it);
if (item == NULL)
return NULL;