@tmm1

What's new in Ruby 2.1?

• Out-of-Band GC 29 Jan 2014 avoid GC pauses during requests with OOBGC

• RGenGC 30 Dec 2013 generational garbage collection to minimize GC pause times

• objspace.so 26 Dec 2013 easier debugging with an allocation tracer and heap dumper

• Profiling Ruby 24 Dec 2013 faster ruby code and rails apps with stackprof

• Process.setproctitle() 23 Dec 2013 improve visibility with customized proclines, now easier than ever

• Process.clock_gettime() 23 Dec 2013 measure time spent on the cpu vs time waiting on i/o

• Frozen String Literals 23 Dec 2013 30% fewer long-lived strings + "".freeze optimization

• Method Cache 22 Dec 2013 hierarchical invalidation, better visibility and new probes