Normal Form Grapheme support improved and fully integrated with I/O. More efficient string storage in bytecode files, and various other bytecode size and startup time improvements. All hashes now uses less memory. Better JIT for many representation access operations. Various concurrency bugs fixed. Native call support for unions. And much more!
Short for "Metamodel On A Runtime", MoarVM is a virtual machine built especially for Rakudo Perl 6 and the NQP Compiler Toolchain. MoarVM stands out amongst the various Rakudo and NQP compilation targets by:
For long-running workloads where startup time doesn't matter and you need tried-and-tested threading support, Rakudo on the JVM may be a better bet. It may also - once the slow startup is overcome - win on performance for some workloads, once its sophisticated JIT compiler gets to work. MoarVM is under active development in these areas, and the gap will close as time goes by.