Forum: Ruby version of ruby compatible with watirgrid and multithreading

Please suggest me version of ruby compatible with watirgrid and
multithreading. thanks.

Is there another option for fastest real browser testing like watirweb
with
multithreading and using 2-3 computers parallely compatible both on
ubuntu and windows?
May be it is other than ruby?
My priority is ease of coding and time efficient!!