On 11 Jul 2013 17:38, "Oscar Benjamin" <oscar.j.benja...@gmail.com> wrote: > > On 11 July 2013 17:21, Russel Walker <russ.po...@gmail.com> wrote: > > To confess, this is the second time I've made the mistake of trying to implement generator like functionality of a builtin when there already is on in itertools. Need to start studying that module abit more I think. I'm looking at the docs now and I see there are actually a couple of isomethings(). > > Your xslice (or mine) would still be better than islice when the step > size is large; islice has to iterate over all the skipped elements > which could be wasteful if the input is indexable. Also islice doesn't > support negative values for start, stop or step which xslice does.
Isn't all of itertools implemented in C? If we are not using a python-level and not-so-fast __getitem__ I would wager the C version is a lot faster. And if the input is indexable could I assume that it is not too large to have around in memory and thus any speed increase in looping over it would be tiny?
-- http://mail.python.org/mailman/listinfo/python-list
