I had Ruby 1.8.2 on the Mac so it was able to run a program with 10,000 iterations per second. and then I installed 1.8.6 with Locomotive and then the program will only run at about 6,500 iterations per second. so i wonder why 1.8.2 is so much faster? obviously 1.8.6 has a lot more features added to it. -- Posted via http://www.ruby-forum.com/.