feat: cdef aliases to eliminate global lookups

Author: BobTheBuidler

cytoolz/itertoolz.pyx

@@ -10,11 +10,26 @@ from cpython.tuple cimport PyTuple_GET_ITEM, PyTuple_GetSlice, PyTuple_New, PyTu
 # Locally defined bindings that differ from `cython.cpython` bindings
 from cytoolz.cpython cimport PtrIter_Next, PtrObject_GetItem
 
-from collections import deque
-from heapq import heapify, heappop, heapreplace
-from itertools import chain, islice, zip_longest
-from operator import itemgetter
-from cytoolz.utils import no_default
+import collections
+import heapq
+import itertools
+import operator
+from cytools import utils
+
+# cdef aliases to eliminate global lookups
+cdef object deque = collections.deque
+
+cdef object heapify = heapq.heapify
+cdef object heappop = heapq.heappop
+cdef object heapreplace = heapq.heapreplace
+
+cdef object chain = itertools.chain
+cdef object islice = itertools.islice
+cdef object zip_longest = itertools.zip_longest
+
+cdef object itemgetter = operator.itemgetter
+
+cdef object no_default = utils.no_default
 
 
 __all__ = ['remove', 'accumulate', 'groupby', 'merge_sorted', 'interleave',