concurrently (rubygems): Concurrently is a concurrency framework for Ruby and mruby based on fibers. With it code can be evaluated independently in its own execution context similar to a thread:      hello = concurrently do       wait 0.2 # seconds       "hello"     end          world = concurrently do       wait 0.1 # seconds       "world"     end          puts "#{hello.await_result} #{world.await_result}" 
Keywords: concurrency|mruby|ruby