class Async::Scheduler

def initialize(parent = nil, selector: nil)

@parameter selector [IO::Event::Selector] The selector to use for event handling.
@parameter parent [Node | Nil] The parent node to use for task hierarchy.
@public Since *Async v1*.

Create a new scheduler. 
def initialize(parent = nil, selector: nil)
	super(parent)
	
	@selector = selector || ::IO::Event::Selector.new(Fiber.current)
	@interrupted = false
	
	@blocked = 0
	
	@busy_time = 0.0
	@idle_time = 0.0
	
	@timers = ::IO::Event::Timers.new
end