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Since the index is always non-negative, use faster unsigned division and modulo.

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Raymond Hettinger 2015-02-27 12:42:54 -08:00
parent b44ed82b81
commit da2850f932
1 changed files with 5 additions and 3 deletions
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4
Modules/_collectionsmodule.c
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@ -780,7 +780,9 @@ deque_item(dequeobject *deque, Py_ssize_t i)
b = deque->rightblock; b = deque->rightblock;
} else { } else {
i += deque->leftindex; i += deque->leftindex;
n = i / BLOCKLEN; assert(i >= 0);
n = (Py_ssize_t)((unsigned) i / BLOCKLEN);
i = (Py_ssize_t)((unsigned) i % BLOCKLEN);
i %= BLOCKLEN; i %= BLOCKLEN;
if (index < (Py_SIZE(deque) >> 1)) { if (index < (Py_SIZE(deque) >> 1)) {
b = deque->leftblock; b = deque->leftblock;