https://i.ytimg.com/vi/cs3Yh9ifTNA/hqdefault.jpg https://www.ruby-lang.org/en/news/2018/02/24/ruby-2-6-0-preview1-released/ "Ruby 2.6 introduces an initial implementation of JIT (Just-in-time) compiler. JIT compiler aims to improve performance of any Ruby program execution. Unlike ordinary JIT compilers for other languages, Ruby’s JIT compiler does JIT compilation in a unique way, which prints C code to a disk and spawns common C compiler process to generate native code. See also: MJIT organization by Vladimir Makarov."