I use it with YARV all the time (usually with the "parallel" gem) to get a Nx speedup on easily parallelisable operations like processing a set of input files,

I use it with YARV all the time (usually with the "parallel" gem) to get a Nx speedup on easily parallelisable operations like processing a set of input files, sending HTTP requests to APIs using threadsafe cURL handles, and so on.