class ParallelEach

Provides a parallel each that lets you enumerate using N threads. Use environment variable N to customize. Defaults to 2. Enumerable, so all the goodies come along (tho not all are wrapped yet to return another ParallelEach instance).

Constants

N: How many Threads to use for this parallel each.

Public Class Methods

new(list) click to toggle source

Create a new ParallelEach instance over list.

# File lib/minitest/parallel_each.rb, line 25
def initialize list
  @queue = Queue.new # *sigh*... the Queue api sucks sooo much...

  list.each { |i| @queue << i }
  N.times { @queue << nil }
end

Public Instance Methods

count() click to toggle source

# File lib/minitest/parallel_each.rb, line 58
def count
  [@queue.size - N, 0].max
end

Also aliased as: size

each() { |job| ... } click to toggle source

Starts N threads that yield each element to your block. Joins the threads at the end.

# File lib/minitest/parallel_each.rb, line 46
def each
  threads = N.times.map {
    Thread.new do
      Thread.current.abort_on_exception = true
      while job = @queue.pop
        yield job
      end
    end
  }
  threads.map(&:join)
end

size()

Alias for: count