On Wed, Apr 29, 2015 at 6:01 PM, Cecil Westerhof <ce...@decebal.nl> wrote: > Op Thursday 30 Apr 2015 00:38 CEST schreef Ian Kelly: >> In that case you can definitely omit the middle term of the slice, >> which will be both more concise and clearer in intent, though >> probably not significantly faster. > > It is certainly nit faster. It is even significantly slower. With the > middle term lucky_numbers(int(1e6)) takes 0.13 seconds. Without it > takes 14.3 seconds. Hundred times as long.
That would be rather surprising, since it's the same operation being performed, so I did my own timing and came up with 0.25 seconds (best of 3) with the middle term and 0.22 seconds without. I suspect that you tested it as "del sieve[skip_count - 1 : skip_count]" (which would delete only one item) rather than "del sieve[skip_count - 1 :: skip_count]". -- https://mail.python.org/mailman/listinfo/python-list