naive_queue_bench.rb

require "benchmark"
require "thread"
require "thread/queue"

methods = {
  push: -> q { N.times { |i| q.push i } },
  pop: -> q { N.times { |i| q.pop } },
  empty?: -> q {
    (N/2).times { |i| q.empty? }
    q.push :tmp
    (N/2).times { |i| q.empty? }
  },
  clear: -> q {
    (N/2).times { q.clear }
    (N/2).times { q << :tmp; q.clear }
  },
  size: -> q { N.times { q.size } },
  num_waiting: -> q { N.times { q.num_waiting } }
}
implementations = [Queue, Thread::Queue]

N = 1_000_000
Benchmark.bmbm(14) do |x|
  queues = implementations.each_with_object({}) { |klass, h| h[klass] = klass.new }
  methods.each_pair { |meth, bench|
    implementations.each { |klass|
      x.report("#{klass.name[0]}##{meth}") {
        bench[queues[klass]]
      }
    }
  }
end

sample_result

Rehearsal -------------------------------------------------
Q#push          0.800000   0.010000   0.810000 (  0.815865)
T#push          0.350000   0.000000   0.350000 (  0.359307)
Q#pop           1.730000   0.010000   1.740000 (  1.777996)
T#pop           0.330000   0.000000   0.330000 (  0.337168)
Q#empty?        0.200000   0.000000   0.200000 (  0.203036)
T#empty?        0.320000   0.010000   0.330000 (  0.318956)
Q#clear         0.590000   0.000000   0.590000 (  0.586799)
T#clear         0.450000   0.000000   0.450000 (  0.448253)
Q#size          0.160000   0.000000   0.160000 (  0.162699)
T#size          0.310000   0.000000   0.310000 (  0.313020)
Q#num_waiting   0.170000   0.000000   0.170000 (  0.164615)
T#num_waiting   0.310000   0.000000   0.310000 (  0.315618)
---------------------------------------- total: 5.750000sec

                    user     system      total        real
Q#push          0.810000   0.000000   0.810000 (  0.818967)
T#push          0.350000   0.000000   0.350000 (  0.369173)
Q#pop           1.710000   0.010000   1.720000 (  1.719467)
T#pop           0.340000   0.000000   0.340000 (  0.344720)
Q#empty?        0.200000   0.000000   0.200000 (  0.202756)
T#empty?        0.310000   0.000000   0.310000 (  0.317207)
Q#clear         0.590000   0.000000   0.590000 (  0.586336)
T#clear         0.450000   0.000000   0.450000 (  0.450514)
Q#size          0.160000   0.000000   0.160000 (  0.162851)
T#size          0.310000   0.000000   0.310000 (  0.316331)
Q#num_waiting   0.160000   0.010000   0.170000 (  0.166712)
T#num_waiting   0.310000   0.000000   0.310000 (  0.315460)