Now it makes sense - thanks. On Wed, Jan 11, 2012 at 3:15 PM, Roger Hui <rogerhui.can...@gmail.com>wrote:
> J allocates memory in chunks of size a power of 2. > > > > On Wed, Jan 11, 2012 at 12:07 PM, Devon McCormick <devon...@gmail.com > >wrote: > > > Well, that would explain a factor of 2 difference but not the factor of > 2.5 > > that I observe. > > > > On Wed, Jan 11, 2012 at 2:44 PM, David Mitchell <davidmitch...@att.net > > >wrote: > > > > > The size of integer is 8 bytes in 64 bit J. > > > > > > On 1/11/2012 14:42, Devon McCormick wrote: > > > > Can anyone explain why this variable is much larger than it ought to > > be? > > > > Are integers more than 4 bytes in 64-bit J7? > > > > > > > > $RH5 > > > > 2598960 5 > > > > 3!:0 RH5 NB. is integer > > > > 4 > > > > */4,$RH5 NB. Should be about this big > > > > 51979200 > > > > 7!:5<'RH5' NB. but this seems far too large, even if there's > some > > > > overhead. > > > > 1.3421773e8 > > > > (7!:5<'RH5') % */4,$RH5 > > > > 2.582143 > > > > > > > > JVERSION > > > > Engine: j701/2011-01-10/11:25 > > > > Library: 7.01.052 > > > > Platform: Win 64 > > > > Installer: j701a_win64.exe > > > > InstallPath: c:/program files (x86)/j64-701 > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
