Hi, I have completed a proof of concept patch for MacRuby where I have split the UI of macrubyc from the underlying logic so that tools like macruby_deploy can make use of the compiler without having to spawn a new macruby process for each file that needs to be compiled. This should also be beneficial for compiling gems and the standard library. After having made this patch, I realized that there are still several places in the compiler where a new process is spawned to perform part of the compilation. I'm not really sure how much else can be lib-ified from the other required components. Overall there are still a few places that I know I can optimize without much work needed. Right now, compile time for ruby files with about 100-200 lines of code is about 1(+/-0.1) seconds on my MBP. Spawning a new macruby process and processing the macrubyc options takes about 0.25 seconds; so I think the patch is still useful in the general case. The code for the changes is located in my MacRuby fork on github: https://github.com/ferrous26/MacRuby/tree/libify-rubyc Mark Rada mrada@marketcircle.com