>> jruby pidigits.rb 2000 takes 4.132s <<

Why did you measure a workload 1/5th of the workload shown on the benchmarks game webpages?

Each program page shows measurements for 3 workloads, in the case of pi-digits 2,000 6,000 and 10,000.

http://shootout.alioth.debian.org/u32/program.php?test=pidig...