euler:jruby brian$ PATH=$PATH:`pwd`/bin time bin/jruby ../rbx-cpp/bench.rb
       17.74 real        16.61 user         0.43 sys
euler:jruby brian$ which time
/usr/bin/time
euler:jruby brian$ PATH=$PATH:`pwd`/bin /usr/bin/time bin/jruby ../rbx-cpp/bench.rb
       17.55 real        16.61 user         0.41 sys
euler:jruby brian$ echo PATH=$PATH:`pwd`/bin bin/jruby ../rbx-cpp/bench.rb > bench  
euler:jruby brian$ cat bench 
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/bin:/opt/local/bin:/Users/brian/bin:/opt/local/lib/postgresql82/bin:/usr/local/mysql/bin:/Users/brian/devel/jruby/bin bin/jruby ../rbx-cpp/bench.rb
euler:jruby brian$ chmod +x bench 
.euler:jruby brian$ ./bench 
euler:jruby brian$ time ./bench 

real    0m29.082s
user    0m27.484s
sys     0m0.697s