On Wed, 20 May 2009, David Mitchell wrote:
> Some fixed tests:
>
> a =: ? 100000000 $ 100
> (100) 6!:2 'b=.+/ a'
> 0.441664432211
> (100) 6!:2 'b=.(+/ % #) a'
> 0.24710853195
> (100) 6!:2 'b=.(+/) a'
> 0.375218973361
My computer does not have enough memory
a =: ? 10000000 $ 100
(100) 6!:2 'b=.+/ a'
0.03619472
(100) 6!:2 '(+/ % #) a'
0.03697641
test again at a different time
(100) 6!:2 '(+/ % #) a'
0.03704908
(100) 6!:2 'b=.+/ a'
0.03556633
--
regards,
====================================================
GPG key 1024D/4434BAB3 2008-08-24
gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
唐詩146 李益 喜見外弟又言別
十年離亂後 長大一相逢 問姓驚初見 稱名憶舊容
別來滄海事 語罷暮天鐘 明日巴陵道 秋山又幾重
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm