work in progress, benching script

script/bench.rb

@@ -0,0 +1,79 @@
+require "socket"
+require "csv"
+
+puts "Running bundle"
+`bundle`
+
+puts "Ensuring config is setup"
+
+unless %x{which ab > /dev/null 2>&1}
+  abort "Apache Bench is not installed. Try: apt-get install apache2-utils or brew install ab"
+end
+
+
+unless File.exists?("config/database.yml")
+  puts "Copying database.yml.development.sample to database.yml"
+  `cp config/database.yml.development-sample config/database.yml`
+end
+
+unless File.exists?("config/redis.yml")
+  puts "Copying redis.yml.sample to redis.yml"
+  `cp config/redis.yml.sample config/redis.yml`
+end
+
+ENV["RAILS_ENV"] = "profile"
+
+def port_available? port
+  server = TCPServer.open port
+  server.close
+  true
+rescue Errno::EADDRINUSE
+  false
+end
+
+port = 60079
+
+while !port_available? port
+  port += 1
+end
+
+puts "Ensuring profiling DB exists and is migrated"
+puts `bundle exec rake db:create`
+`bundle exec rake db:migrate`
+
+puts "Loading Rails"
+require File.expand_path(File.dirname(__FILE__) + "/../config/environment")
+
+
+begin
+  unless pid = fork
+    require "rack"
+    Rack::Server.start(:config => "config.ru",
+                       :AccessLog => [],
+                       :Port => port)
+    exit
+  end
+
+  while port_available? port
+    sleep 1
+  end
+
+  puts "Running apache bench warmup"
+  `ab -n 100 http://localhost:#{port}/`
+  puts "Benchmarking front page"
+  `ab -n 100 -e tmp/ab.csv http://localhost:#{port}/`
+
+  percentiles = Hash[*[50, 75, 90, 99].zip([]).flatten]
+  CSV.foreach("tmp/ab.csv") do |percent, time|
+    percentiles[percent.to_i] = time.to_i if percentiles.key? percent.to_i
+  end
+
+  puts "Your Results:"
+
+  puts({
+    "home_page" => percentiles
+  }.to_yaml)
+
+ensure
+  Process.kill "KILL", pid
+end