Full Unicode 9.0 and Emoji 4.0 text segmentation support. Faster normalization, string indexing, and string concatenation. Collation improvements, including support for reversing any of the levels. Optional output buffering on file handles. Numerous tweaks to dynamic optimization and JIT compilation to improve code quality, with a focus on Perl 6 I/O code. Asynchronous process handling improvements, including support for retrieving and plumbing together processes at the file descriptor level. And numerous other fixes and enhancements.
Short for "Metamodel On A Runtime", MoarVM is a modern virtual machine built for the Rakudo Perl 6 compiler and the NQP Compiler Toolchain. MoarVM is used by the majority of Perl 6 programmers. Highlights include: