Some sample on IRB
JIT for Ruby ?
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.
How to use: Just specify --jit in command line or $RUBYOPT environment variable. Specifying --jit-verbose=1 allows to print basic information of ongoing JIT compilation. See ruby --help for other options.