Short for "Metamodel On A Runtime", MoarVM is a modern virtual machine built for the Rakudo Raku (formerly Perl 6) compiler and the NQP Compiler Toolchain. MoarVM is used by the majority of Raku programmers.

Highlights include: * Great Unicode support, with strings represented at grapheme level * Dynamic analysis of running code to identify hot functions and loops, and perform a range of optimizations, including type specialization and inlining * Support for threads, a range of concurrency control constructs, and asynchronous sockets, timers, processes, and more * Generational, parallel, garbage collection * Support for numerous language features, including first class functions, exceptions, continuations, runtime loading of code, big integers and interfacing with native libraries