10.5. Programming Languages
- New interpreter, YARV (yet another Ruby VM), which significantly reduces loading times, especially for applications with large trees or files;
- New and faster "Lazy Sweep" garbage collector;
- Ruby now supports string encoding;
- Ruby now supports native threads instead of green threads.
- An ordered dictionary type;
- A faster I/O module;
- Dictionary comprehensions and set comprehensions;
- The sysconfig module.
Java 7 and Multiple JDKs