Well, that's not exactly an improvement ts'x <[EMAIL PROTECTED] 17' 0.19952 2.09723e7 ts'x (([ - |~) % ]) 17' 0.0545567 1.25841e7
ts'x % 17' 0.0182892 8.38925e6 ts'_4 (33 b.) x' 0.00982667 4.1952e6 datatype x (([ - |~) % ]) 17 floating Maybe a method that represents interger division in terms of binary shifts. Mike Day mike_liz.day at tiscali.co.uk wrote Sat Oct 21 16:18:53 HKT 2006 FWIW, pending J6.02, this offers some improvement in time and space: NB. in J 6.0.1 NB. reduce x to an integer multiple of y before divide NB. does it work for -ve & +ve x (x-300000) (<[EMAIL PROTECTED] -: ([ - |~) % ]) 17 1 ts'x <[EMAIL PROTECTED] 17' 0.210536 2.09723e7 ts'x (([ - |~) % ]) 17' 0.0587469 1.25841e7 I expect there's a better way still, and still in 6.01 ! Mike Roger Hui wrote: > Preliminary benchmarks: > > ts=: 6!:2 , 7!:[EMAIL PROTECTED] > x=: 1e6 [EMAIL PROTECTED] 2e6 > ts 'Expression' > > Expression J6.02x J6.01 Factor > x <[EMAIL PROTECTED] 512 0.0054822 4.19507e6 0.136416 2.09723e7 23.80 > 5.00 > x <[EMAIL PROTECTED] 17 0.0213073 4.19507e6 0.154837 2.09723e7 7.27 > 5.00 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
