"¹عبٌ¼·(Park, Hee-Sob)" <phasis / channeli.net> wrote in message news:960thl$e6g$1 / b5nntp2.channeli.net... > Is there any comparison data other than > http://www.bagley.org/~doug/shootout/craps.shtml ? Tried the Ackerman test. I was able to run it up to Ack(3, N) where N is 6. But when using N=7 I got: ruby 1.6.1 (2000-10-05) [i386-cygwin] ackerman.rb:7:in `ack': stack level too deep (SystemStackError) Is there any difference in the stack size used in Ruby for Win32 and Ruby on Linux? Best regards Robert