module to execute external programs or internal code blocks as separate process

 Mojo::IOLoop::ReadWriteProcess is yet another Mojo process manager. Processes
 can be either internal blocks or code, or external programs.
 .
 Mojo::IOLoop::ReadWriteProces inherits all events, attributes, and methods
 from Mojo::EventEmitter and adds new ones. It supports running processes
 directly, in parallel, in batch mode, and in a queue.