2016-12-15-io-bound-threads-in-ruby

cpu_bound1.rb

require 'benchmark'

@threads = []
Benchmark.bm(14) do |x|
  x.report('no-threads') do
    8.times do
      tmp_array = []
      10_000_000.times { |n| tmp_array << n }
    end
  end

  x.report('with-threads') do
    8.times do
      @threads << Thread.new do
        tmp_array = []
        10_000_000.times { |n| tmp_array << n }
      end
    end
    @threads.each(&:join)
  end
end

cpu_bound_results.sh

                     user     system      total        real
no-threads       4.180000   0.280000   4.460000 (  4.500382)
with-threads     4.290000   0.270000   4.560000 (  4.647151)

io_bound.rb

require 'faraday'
require 'benchmark'

@conn = Faraday.new(url: 'https://www.google.com')
@threads = []

Benchmark.bm(14) do |x|
  x.report('no-threads') do
    8.times { @conn.get }
  end

  x.report('with-threads') do
    8.times do
      @threads << Thread.new { @conn.get }
    end
    @threads.each(&:join)
  end
end

io_bound_results.sh

                     user     system      total        real
no-threads       0.100000   0.020000   0.120000 (  3.201572)
with-threads     0.110000   0.010000   0.120000 (  0.580500)