i. builds a hash table. m&i. builds the table when the verb is defined; m i. y builds the table when i. is executed.
Henry Rich > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Thursday, June 07, 2007 5:50 PM > To: General forum > Subject: [Jgeneral] Roger ! what is the secret under the hood ? > > Roger, > Why is 'f a' so much faster ? > > a=:(i.1e7)+_1+2^31 > ts'i.~a' > 7.41238 2.01327e8 > f=:a&i. > ts'f a' > 4.6502 6.71097e7 > 5!:5<'f' > (2147483647+i.10000000)&i. > ts'(2147483647+i.10000000)&i.a' > 7.79408 4.69764e8 > > > Paul Gauthier > APL Software Developer - Senior > [EMAIL PROTECTED] > Phone: 312-739-3467 > Fax: 312-739-3496 > > CheckFree. The Company that Powers Payment on the WebSM. > http://www.checkfree.com/paybillsonline > ---------------------------------------------------------------------- > For information about J forums see > http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
