add db population

Author: SamSaffron

script/bench.rb

@@ -76,11 +76,13 @@ def port_available? port
 puts `bundle exec rake db:create`
 `bundle exec rake db:migrate`
 
-puts "Loading Rails"
+puts "Timing loading Rails"
 measure("load_rails") do
   `bundle exec rake middleware`
 end
 
+puts "Populating Profile DB"
+run("bundle exec ruby script/profile_db_generator.rb")
 
 begin
   pid = spawn("bundle exec thin start -p #{port}")

script/profile_db_generator.rb

@@ -1,5 +1,16 @@
 # can be used to generate a mock db for profiling purposes
 
+# we want our script to generate a consistent output, to do so
+#  we monkey patch array sample so it always uses the same rng
+class Array
+  RNG = Random.new(1098109928029800)
+
+  def sample
+    self[RNG.rand(size)]
+  end
+end
+
+
 # based on https://gist.github.com/zaius/2643079
 def unbundled_require(gem)
   if defined?(::Bundler)
@@ -21,8 +32,9 @@ def unbundled_require(gem)
 begin
   unbundled_require 'gabbler'
 rescue LoadError
-  puts "please run: gem install gabller"
-  exit
+  puts "installing gabbler gem"
+  puts `gem install gabbler`
+  unbundled_require 'gabbler'
 end
 
 user_id = nil