Victor Reyes schrieb:
[...]
> ruby -v
> ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
> 
> *Ruby:
> ruby sudoku01final.rb
> Elapsed Time: 0.437 Secs*
> 
> jruby -v
> ruby 1.8.6 (2008-05-28 rev 6586) [x86-jruby1.1.2]
> *JRuby:
> jruby sudoku01final.rb
> Elapsed Time: 1.058 Secs*

jruby has certainly higher startup costs than native Ruby, but that does 
not mean its overall performance is bad. I suggest you modify the 
program so it runs for example 10 times and then run again. I am sure 
the JRuby program will be very much below 10s

bye Jochen