Short for "Metamodel On A Runtime", MoarVM is a modern virtual machine built for the Rakudo compiler implementing the Raku Programming Language, 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