New submission from Jesús Cea Avión: If L is a big sequence and I do "itertool.islice(L, 1000000, None)", islice will go over a million elements before returning the first that I actually cared.
Since L is a sequence, islice could go directly to the element 1000000. My program performance improved hugely replacing a "for i in L[p:]" for "for i in (L[p] for p in range(p, len(L)))". Using itertools and doing "for i in itertools.islice(L, p, None)" is massively inefficient. ---------- components: Extension Modules messages: 220417 nosy: jcea priority: normal severity: normal status: open title: itertools.islice() goes over all the pre-initial elements even if the iterable can seek type: enhancement versions: Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21744> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
