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jballanc/rubymotion_under_the_hood.markdown

Created October 11, 2013 16:18
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rubymotion_under_the_hood.markdown

Background

  • MacRuby was going to be Ruby for OS X
  • JIT Compiler or AOT Compiler
  • Experimental static compilation
  • The Garbage Collector - libauto

Building an App

  • How does static compilation work?

Objects

  • RubyMotion objects are Obj-C objects
  • Ruby-ish introspection on Obj-C objects
  • Obj-C-ish introspection on Ruby objects

Memory

  • Garbage Collection vs (Automatic) Reference Counting
  • ARC vs RubyMotion
  • Don't worry about memory...except when you need to

Interfacing with Obj-C

  • CocoaPods and other shared frameworks/libraries
  • Calling Obj-C from RubyMotion
  • Calling into RubyMotion from Obj-C

Limitations

RubyMotion

  • eval and other metaprogramming
  • Reference cycles and GC trade-offs

MacRuby

  • GC "going away"
  • Reference Counting, run loops, and ruby scripts
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