It's definitely a JVM problem, but contrary to Java, there is a sort of REPL available. Instead if writing a file, modifying it and running 'jruby my-script.rb'

It's definitely a JVM problem, but contrary to Java, there is a sort of REPL available. Instead if writing a file, modifying it and running 'jruby my-script.rb', just issue 'load myscript.rb' in your (j)irb. That makes for much faster iterations.