On Sat, Jun 1, 2013 at 1:55 PM, <nadine.and.henry@pobox.com> wrote:
a Dell laptop and a desktop.  I compiled this message with ghc -O2
--make ex429.lhs and ran it on each machine.  On the Dell I get:

136342232
./ex429  8.66s user 0.02s system 99% cpu 8.695 total

When I run this exact same file on the desktop, I get:

98792821
./ex429  6.50s user 0.03s system 99% cpu 6.537 total

Which happens to be the right answer.  But WHY is the output from the
Dell different?
(hardware description elided)

You're missing one piece of information: do you have the 32-bit or the 64-bit ghc installed on each machine?
 
--
brandon s allbery kf8nh                               sine nomine associates
allbery.b@gmail.com                                  ballbery@sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net