diff --git a/lib/action_cable.rb b/lib/action_cable.rb
index de1b08f789..89ffa1fda7 100644
--- a/lib/action_cable.rb
+++ b/lib/action_cable.rb
@@ -1,34 +1,21 @@
-require 'eventmachine'
-EventMachine.epoll  if EventMachine.epoll?
-EventMachine.kqueue if EventMachine.kqueue?
-
-require 'set'
-
 require 'active_support'
-require 'active_support/json'
-require 'active_support/concern'
-require 'active_support/core_ext/hash/indifferent_access'
-require 'active_support/core_ext/module/delegation'
-require 'active_support/callbacks'
-
-require 'faye/websocket'
-require 'celluloid'
-require 'em-hiredis'
-require 'redis'
-
-require 'action_cable/engine' if defined?(Rails)
-require 'action_cable/railtie' if defined?(Rails)
-
+require 'active_support/rails'
 require 'action_cable/version'
 
 module ActionCable
-  autoload :Server, 'action_cable/server'
-  autoload :Connection, 'action_cable/connection'
-  autoload :Channel, 'action_cable/channel'
-  autoload :RemoteConnections, 'action_cable/remote_connections'
+  extend ActiveSupport::Autoload
 
   # Singleton instance of the server
   module_function def server
     @server ||= ActionCable::Server::Base.new
   end
+
+  eager_autoload do
+    autoload :Server
+    autoload :Connection
+    autoload :Channel
+    autoload :RemoteConnections
+  end
 end
+
+require 'action_cable/engine' if defined?(Rails)
diff --git a/lib/action_cable/channel.rb b/lib/action_cable/channel.rb
index 3b973ba0a7..7ae262ce5f 100644
--- a/lib/action_cable/channel.rb
+++ b/lib/action_cable/channel.rb
@@ -1,10 +1,14 @@
 module ActionCable
   module Channel
-    autoload :Base, 'action_cable/channel/base'
-    autoload :Broadcasting, 'action_cable/channel/broadcasting'
-    autoload :Callbacks, 'action_cable/channel/callbacks'
-    autoload :Naming, 'action_cable/channel/naming'
-    autoload :PeriodicTimers, 'action_cable/channel/periodic_timers'
-    autoload :Streams, 'action_cable/channel/streams'
+    extend ActiveSupport::Autoload
+
+    eager_autoload do
+      autoload :Base
+      autoload :Broadcasting
+      autoload :Callbacks
+      autoload :Naming
+      autoload :PeriodicTimers
+      autoload :Streams
+    end
   end
 end
diff --git a/lib/action_cable/channel/base.rb b/lib/action_cable/channel/base.rb
index 17ac1a97af..df87064195 100644
--- a/lib/action_cable/channel/base.rb
+++ b/lib/action_cable/channel/base.rb
@@ -1,3 +1,5 @@
+require 'set'
+
 module ActionCable
   module Channel
     # The channel provides the basic structure of grouping behavior into logical units when communicating over the WebSocket connection.
@@ -159,7 +161,7 @@ module ActionCable
         # the proper channel identifier marked as the recipient.
         def transmit(data, via: nil)
           logger.info "#{self.class.name} transmitting #{data.inspect}".tap { |m| m << " (via #{via})" if via }
-          connection.transmit({ identifier: @identifier, message: data }.to_json)
+          connection.transmit ActiveSupport::JSON.encode(identifier: @identifier, message: data)
         end
 
 
diff --git a/lib/action_cable/connection.rb b/lib/action_cable/connection.rb
index 3d6ed6a6e8..b672e00682 100644
--- a/lib/action_cable/connection.rb
+++ b/lib/action_cable/connection.rb
@@ -1,12 +1,16 @@
 module ActionCable
   module Connection
-    autoload :Authorization, 'action_cable/connection/authorization'
-    autoload :Base, 'action_cable/connection/base'
-    autoload :Identification, 'action_cable/connection/identification'
-    autoload :InternalChannel, 'action_cable/connection/internal_channel'
-    autoload :MessageBuffer, 'action_cable/connection/message_buffer'
-    autoload :WebSocket, 'action_cable/connection/web_socket'
-    autoload :Subscriptions, 'action_cable/connection/subscriptions'
-    autoload :TaggedLoggerProxy, 'action_cable/connection/tagged_logger_proxy'
+    extend ActiveSupport::Autoload
+
+    eager_autoload do
+      autoload :Authorization
+      autoload :Base
+      autoload :Identification
+      autoload :InternalChannel
+      autoload :MessageBuffer
+      autoload :WebSocket
+      autoload :Subscriptions
+      autoload :TaggedLoggerProxy
+    end
   end
 end
diff --git a/lib/action_cable/connection/base.rb b/lib/action_cable/connection/base.rb
index de27628d7d..9f74226f98 100644
--- a/lib/action_cable/connection/base.rb
+++ b/lib/action_cable/connection/base.rb
@@ -119,7 +119,7 @@ module ActionCable
       end
 
       def beat
-        transmit({ identifier: '_ping', message: Time.now.to_i }.to_json)
+        transmit ActiveSupport::JSON.encode(identifier: '_ping', message: Time.now.to_i)
       end
 
 
@@ -203,7 +203,7 @@ module ActionCable
             request.filtered_path,
             websocket.possible? ? ' [WebSocket]' : '',
             request.ip,
-            Time.now.to_default_s ]
+            Time.now.to_s ]
         end
 
         def finished_request_message
@@ -211,7 +211,7 @@ module ActionCable
             request.filtered_path,
             websocket.possible? ? ' [WebSocket]' : '',
             request.ip,
-            Time.now.to_default_s ]
+            Time.now.to_s ]
         end
     end
   end
diff --git a/lib/action_cable/connection/identification.rb b/lib/action_cable/connection/identification.rb
index 95863795dd..431493aa70 100644
--- a/lib/action_cable/connection/identification.rb
+++ b/lib/action_cable/connection/identification.rb
@@ -1,3 +1,5 @@
+require 'set'
+
 module ActionCable
   module Connection
     module Identification
@@ -31,7 +33,13 @@ module ActionCable
 
       private
         def connection_gid(ids)
-          ids.map { |o| (o.try(:to_global_id) || o).to_s }.sort.join(":")
+          ids.map do |o|
+            if o.respond_to? :to_global_id
+              o.to_global_id
+            else
+              o.to_s
+            end
+          end.sort.join(":")
         end
     end
   end
diff --git a/lib/action_cable/connection/subscriptions.rb b/lib/action_cable/connection/subscriptions.rb
index 69e3f60706..229be2a316 100644
--- a/lib/action_cable/connection/subscriptions.rb
+++ b/lib/action_cable/connection/subscriptions.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/hash/indifferent_access'
+
 module ActionCable
   module Connection
     # Collection class for all the channel subscriptions established on a given connection. Responsible for routing incoming commands that arrive on
diff --git a/lib/action_cable/connection/web_socket.rb b/lib/action_cable/connection/web_socket.rb
index 135a28cfe4..169b683b8c 100644
--- a/lib/action_cable/connection/web_socket.rb
+++ b/lib/action_cable/connection/web_socket.rb
@@ -1,3 +1,5 @@
+require 'faye/websocket'
+
 module ActionCable
   module Connection
     # Decorate the Faye::WebSocket with helpers we need.
diff --git a/lib/action_cable/engine.rb b/lib/action_cable/engine.rb
index 6c943c7971..613a9b99f2 100644
--- a/lib/action_cable/engine.rb
+++ b/lib/action_cable/engine.rb
@@ -1,4 +1,22 @@
+require 'rails/engine'
+require 'active_support/ordered_options'
+
 module ActionCable
   class Engine < ::Rails::Engine
+    config.action_cable = ActiveSupport::OrderedOptions.new
+
+    initializer "action_cable.logger" do
+      ActiveSupport.on_load(:action_cable) { self.logger ||= ::Rails.logger }
+    end
+
+    initializer "action_cable.set_configs" do |app|
+      options = app.config.action_cable
+
+      options.allowed_request_origins ||= "http://localhost:3000" if ::Rails.env.development?
+
+      ActiveSupport.on_load(:action_cable) do
+        options.each { |k,v| send("#{k}=", v) }
+      end
+    end
   end
 end
diff --git a/lib/action_cable/railtie.rb b/lib/action_cable/railtie.rb
deleted file mode 100644
index 0be6d19620..0000000000
--- a/lib/action_cable/railtie.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-module ActionCable
-  class Railtie < Rails::Railtie
-    config.action_cable = ActiveSupport::OrderedOptions.new
-
-    initializer "action_cable.logger" do
-      ActiveSupport.on_load(:action_cable) { self.logger ||= ::Rails.logger }
-    end
-
-    initializer "action_cable.set_configs" do |app|
-      options = app.config.action_cable
-
-      options.allowed_request_origins ||= "http://localhost:3000" if ::Rails.env.development?
-
-      ActiveSupport.on_load(:action_cable) do
-        options.each { |k,v| send("#{k}=", v) }
-      end
-    end
-  end
-end
diff --git a/lib/action_cable/server.rb b/lib/action_cable/server.rb
index 2278509341..a2a89d5f1e 100644
--- a/lib/action_cable/server.rb
+++ b/lib/action_cable/server.rb
@@ -1,11 +1,19 @@
+require 'eventmachine'
+EventMachine.epoll  if EventMachine.epoll?
+EventMachine.kqueue if EventMachine.kqueue?
+
 module ActionCable
   module Server
-    autoload :Base, 'action_cable/server/base'
-    autoload :Broadcasting, 'action_cable/server/broadcasting'
-    autoload :Connections, 'action_cable/server/connections'
-    autoload :Configuration, 'action_cable/server/configuration'
+    extend ActiveSupport::Autoload
 
-    autoload :Worker, 'action_cable/server/worker'
-    autoload :ActiveRecordConnectionManagement, 'action_cable/server/worker/active_record_connection_management'
+    eager_autoload do
+      autoload :Base
+      autoload :Broadcasting
+      autoload :Connections
+      autoload :Configuration
+
+      autoload :Worker
+      autoload :ActiveRecordConnectionManagement, 'action_cable/server/worker/active_record_connection_management'
+    end
   end
 end
diff --git a/lib/action_cable/server/base.rb b/lib/action_cable/server/base.rb
index 5b7ddf4185..f1585dc776 100644
--- a/lib/action_cable/server/base.rb
+++ b/lib/action_cable/server/base.rb
@@ -1,3 +1,5 @@
+require 'em-hiredis'
+
 module ActionCable
   module Server
     # A singleton ActionCable::Server instance is available via ActionCable.server. It's used by the rack process that starts the cable server, but
diff --git a/lib/action_cable/server/broadcasting.rb b/lib/action_cable/server/broadcasting.rb
index 037b98951e..6e0fbae387 100644
--- a/lib/action_cable/server/broadcasting.rb
+++ b/lib/action_cable/server/broadcasting.rb
@@ -1,3 +1,5 @@
+require 'redis'
+
 module ActionCable
   module Server
     # Broadcasting is how other parts of your application can send messages to the channel subscribers. As explained in Channel, most of the time, these
@@ -44,9 +46,9 @@ module ActionCable
 
           def broadcast(message)
             server.logger.info "[ActionCable] Broadcasting to #{broadcasting}: #{message}"
-            server.broadcasting_redis.publish broadcasting, message.to_json
+            server.broadcasting_redis.publish broadcasting, ActiveSupport::JSON.encode(message)
           end
         end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/action_cable/server/configuration.rb b/lib/action_cable/server/configuration.rb
index 315782ec3e..b22de273b8 100644
--- a/lib/action_cable/server/configuration.rb
+++ b/lib/action_cable/server/configuration.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/hash/indifferent_access'
+
 module ActionCable
   module Server
     # An instance of this configuration object is available via ActionCable.server.config, which allows you to tweak the configuration points
diff --git a/lib/action_cable/server/worker.rb b/lib/action_cable/server/worker.rb
index 91496775b8..e063b2a2e1 100644
--- a/lib/action_cable/server/worker.rb
+++ b/lib/action_cable/server/worker.rb
@@ -1,3 +1,6 @@
+require 'celluloid'
+require 'active_support/callbacks'
+
 module ActionCable
   module Server
     # Worker used by Server.send_async to do connection work in threads. Only for internal use.
@@ -36,4 +39,4 @@ module ActionCable
         end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/test/connection/identifier_test.rb b/test/connection/identifier_test.rb
index f34b66f9fd..02e6b21845 100644
--- a/test/connection/identifier_test.rb
+++ b/test/connection/identifier_test.rb
@@ -40,7 +40,7 @@ class ActionCable::Connection::IdentifierTest < ActionCable::TestCase
       open_connection_with_stubbed_pubsub
 
       @connection.websocket.expects(:close)
-      message = { 'type' => 'disconnect' }.to_json
+      message = ActiveSupport::JSON.encode('type' => 'disconnect')
       @connection.process_internal_message message
     end
   end
@@ -50,7 +50,7 @@ class ActionCable::Connection::IdentifierTest < ActionCable::TestCase
       open_connection_with_stubbed_pubsub
 
       @connection.websocket.expects(:close).never
-      message = { 'type' => 'unknown' }.to_json
+      message = ActiveSupport::JSON.encode('type' => 'unknown')
       @connection.process_internal_message message
     end
   end
diff --git a/test/connection/subscriptions_test.rb b/test/connection/subscriptions_test.rb
index 55ad74b962..4f6760827e 100644
--- a/test/connection/subscriptions_test.rb
+++ b/test/connection/subscriptions_test.rb
@@ -27,7 +27,7 @@ class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
     @server = TestServer.new
     @server.stubs(:channel_classes).returns(ChatChannel.name => ChatChannel)
 
-    @chat_identifier = { id: 1, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel' }.to_json
+    @chat_identifier = ActiveSupport::JSON.encode(id: 1, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel')
   end
 
   test "subscribe command" do
@@ -77,7 +77,7 @@ class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
       channel = subscribe_to_chat_channel
 
       data = { 'content' => 'Hello World!', 'action' => 'speak' }
-      @subscriptions.execute_command 'command' => 'message', 'identifier' => @chat_identifier, 'data' => data.to_json
+      @subscriptions.execute_command 'command' => 'message', 'identifier' => @chat_identifier, 'data' => ActiveSupport::JSON.encode(data)
 
       assert_equal [ data ], channel.lines
     end
@@ -89,7 +89,7 @@ class ActionCable::Connection::SubscriptionsTest < ActionCable::TestCase
 
       channel1 = subscribe_to_chat_channel
 
-      channel2_id = { id: 2, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel' }.to_json
+      channel2_id = ActiveSupport::JSON.encode(id: 2, channel: 'ActionCable::Connection::SubscriptionsTest::ChatChannel')
       channel2 = subscribe_to_chat_channel(channel2_id)
 
       channel1.expects(:unsubscribe_from_channel)
diff --git a/test/test_helper.rb b/test/test_helper.rb
index b9cb34f891..34c7def46b 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -18,10 +18,12 @@ ActiveSupport.test_order = :sorted
 # Require all the stubs and models
 Dir[File.dirname(__FILE__) + '/stubs/*.rb'].each {|file| require file }
 
+require 'celluloid'
 $CELLULOID_DEBUG = false
 $CELLULOID_TEST = false
 Celluloid.logger = Logger.new(StringIO.new)
 
+require 'faye/websocket'
 class << Faye::WebSocket
   remove_method :ensure_reactor_running