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priority 

        # Thread.priority

(from ruby core)
---
    thr.priority   -> integer

---

Returns the priority of *thr*. Default is inherited from the current
thread which creating the new thread, or zero for the initial main
thread; higher-priority thread will run more frequently than
lower-priority threads (but lower-priority threads can also run).

This is just hint for Ruby thread scheduler.  It may be ignored on some
platform.

    Thread.current.priority   #=> 0

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.