Ruby 1.9 is way faster than Ruby 1.8.6

I got a chance to test it. Its actually true. I'm on OSX so I used mac ports to install ruby1.9 parallel to 1.8.6. Since I use TextMate for development, heading to preferences -> Advances -> Shell variables and setting TM_RUBY to the actual location of the Ruby 1.9 binary. My Sudoku solver previously had the following results.

Analyzer::Simple ran 5 puzzles in 5.524553 seconds with 107442 moves and 107168 rollbacks
Analyzer::ConstraintsChecking ran 5 puzzles in 37.719066 seconds with 36202 moves and 35928 rollbacks
Analyzer::LeastChoicesFirst ran 5 puzzles in 0.745781 seconds with 631 moves and 357 rollbacks

Here are the same results of the same runs with Ruby 1.9.

Analyzer::Simple ran 5 puzzles in 3.905158 seconds with 107442 moves and 107168 rollbacks
Analyzer::ConstraintsChecking ran 5 puzzles in 25.035866 seconds with 36202 moves and 35928 rollbacks
Analyzer::LeastChoicesFirst ran 5 puzzles in 0.527032 seconds with 631 moves and 357 rollbacks

Now ideally it should be twice as fast but my machine is loaded up with a lot of open tabs :/. But still yeah Ruby 1.9 better!