simple watir-webdriver threading example for load testing

thread.rb

require 'thread'
require 'watir-webdriver'

def test_google
  3.times do
    browser = Watir::Browser.start 'http://www.etsy.com', :chrome
    browser.text_field(:name, 'search_query').set 'hat'
    start_time = Time.now
    browser.button(:text, 'Search').click
    end_time = Time.now
    puts end_time - start_time
    browser.close
  end
end

threads = []
30.times do
  threads << Thread.new {test_google}
end
threads.each {|x| x.join}

Works great for a maximum of ten concurrent instances. How would you suggest scaling this up to 30-40 concurrent instances??

My local machine goes out of memory once I try to load 30 browsers at a time. Tried headless also. Haven't had much luck. :(

Thanks for this code !