Support for references to native lexicals, attributes, and array elements, along with a number of new instructions for working with them. Improved native calling, including passing native arrays and VM-level support for C numeric type sizes. Better symlink-handling support, including readlink and lstat. And, as always, various bug fixes and performance improvements.
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.