Event Machine Test - Checking performance between EventMachine and the underlying Threads. My results show that for 1.9.3, EventMachine executes MUCH faster than the just using Thread.new. However, for 2.0.0 and Rubinius, using Thread.new seems to be the same or marginally faster. https://github.com/eventmachine/eventmachine/search?q=Thread.new&…

test_with_io.rb

require 'eventmachine'

def write_file(text)
  filename = "/Users/iHiD/Desktop/dump.txt"
  File.open(filename, 'w') do |f|
    f.flock(File::LOCK_EX)
    f.write(text)
    sleep 0.005
  end
end

speed = 400

fast_proc = Proc.new { speed.times {|i| write_file(i) } }
slow_proc = Proc.new { (speed * 1.1).to_i.times {|i| write_file(i) } }

EventMachine.run do
  EM.defer do
    puts "EM 1"
    fast_proc.call
    puts "EM 3"
  end
  EM.defer do
    puts "EM 2"
    slow_proc.call
    puts "EM 4"
  end
  Thread.new do
    puts "Thread 1"
    fast_proc.call
    puts "Thread 3"
  end
  Thread.new do
    puts "Thread 2"
    slow_proc.call
    puts "Thread 4"
  end
end

test_without_io.rb

require 'eventmachine'

EventMachine.run do
  EM.defer do
    puts "EM 1"
    i = 0
    20000000.times{ i += 1 }
    puts "EM 3"
  end
  EM.defer do
    puts "EM 2"
    i = 0
    30000000.times{ i += 1 }
    puts "EM 4"
  end
  Thread.new do
    puts "Thread 1"
    i = 0
    20000000.times{ i += 1 }
    puts "Thread 3"
  end
  Thread.new do
    puts "Thread 2"
    i = 0
    30000000.times{ i += 1 }
    puts "Thread 4"
  end
end