ObjectSpace - record rails allocations

gistfile1.rb

# Load the rails application
require File.expand_path('../application', __FILE__)
require 'objspace'
require 'digest/md5'
require 'base64'

# Initialize the rails application
MyApp::Application.initialize!
objs = File.open("/tmp/objs.txt", 'w')
at_exit {
  objs.close
}

EXISTING_IDS = {}

ObjectSpace.each_object(String).to_a.each do |object|
  EXISTING_IDS[object.object_id / 1000] ||= []
  EXISTING_IDS[object.object_id / 1000] << object.object_id
end

ObjectSpace.trace_object_allocations do
  MyApp::Application.initialize!
  ObjectSpace.each_object(String).to_a.each do |object|
    next if ObjectSpace.allocation_sourcefile(object).nil?
    next if ObjectSpace.allocation_sourcefile(object) == __FILE__
    next if EXISTING_IDS[object.object_id / 1000] &&
            EXISTING_IDS[object.object_id / 1000].include?(object.object_id)
    location = "#{ObjectSpace.allocation_sourcefile(object)}:#{ObjectSpace.allocation_sourceline(object)}"
    checksum = Digest::MD5.hexdigest(location)
    str_checksum = Digest::MD5.hexdigest(object.to_s)
    objs.puts "#{str_checksum} #{checksum} #{location} #{object.to_s}"
  end
end