--- a/config/environments/development.rb	Wed May 08 00:18:36 2013 +0900
+++ b/config/environments/development.rb	Wed May 08 00:29:54 2013 +0900
@@ -1,29 +1,29 @@
 Zeropaste::Application.configure do
-  # Settings specified here will take precedence over those in config/application.rb
+  # Settings specified here will take precedence over those in config/application.rb.
 
   # In the development environment your application's code is reloaded on
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
-  # Show full error reports and disable caching
+  # Do not eager load code on boot.
+  config.eager_load = false
+
+  # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
 
-  # Don't care if the mailer can't send
-  # config.action_mailer.raise_delivery_errors = false
+  # Don't care if the mailer can't send.
+  config.action_mailer.raise_delivery_errors = false
 
-  # Print deprecation notices to the Rails logger
+  # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
 
-  # Only use best-standards-support built into browsers
-  config.action_dispatch.best_standards_support = :builtin
-
-  # Do not compress assets
-  config.assets.compress = false
+  # Raise an error on page load if there are pending migrations
+  config.active_record.migration_error = :page_load
 
-  # Expands the lines which load the assets
+  # Debug mode disables concatenation and preprocessing of assets.
+  # This option may cause significant delays in view rendering with a large
+  # number of complex assets.
   config.assets.debug = true
-
-  config.eager_load = false
 end

--- a/config/environments/production.rb	Wed May 08 00:18:36 2013 +0900
+++ b/config/environments/production.rb	Wed May 08 00:29:54 2013 +0900
@@ -1,65 +1,80 @@
 Zeropaste::Application.configure do
-  # Settings specified here will take precedence over those in config/application.rb
+  # Settings specified here will take precedence over those in config/application.rb.
 
-  # Code is not reloaded between requests
+  # Code is not reloaded between requests.
   config.cache_classes = true
 
-  # Full error reports are disabled and caching is turned on
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both thread web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
+  # Full error reports are disabled and caching is turned on.
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
 
-  # Disable Rails's static asset server (Apache or nginx will already do this)
+  # Enable Rack::Cache to put a simple HTTP cache in front of your application
+  # Add `rack-cache` to your Gemfile before enabling this.
+  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
+  # config.action_dispatch.rack_cache = true
+
+  # Disable Rails's static asset server (Apache or nginx will already do this).
   config.serve_static_assets = false
 
-  # Compress JavaScripts and CSS
-  config.assets.compress = true
+  # Compress JavaScripts and CSS.
+  config.assets.js_compressor = :uglifier
+  # config.assets.css_compressor = :sass
 
-  # Don't fallback to assets pipeline if a precompiled asset is missed
+  # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
-  # Generate digests for assets URLs
+  # Generate digests for assets URLs.
   config.assets.digest = true
 
-  # Defaults to nil and saved in location specified by config.assets.prefix
-  # config.assets.manifest = YOUR_PATH
+  # Version of your assets, change this if you want to expire all your assets.
+  config.assets.version = '1.0'
 
-  # Specifies the header that your server uses for sending files
+  # Specifies the header that your server uses for sending files.
   # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
-  # See everything in the log (default is :info)
-  # config.log_level = :debug
+  # Set to :debug to see everything in the log.
+  config.log_level = :info
 
-  # Prepend all log lines with the following tags
+  # Prepend all log lines with the following tags.
   # config.log_tags = [ :subdomain, :uuid ]
 
-  # Use a different logger for distributed setups
+  # Use a different logger for distributed setups.
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
-  # Use a different cache store in production
+  # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
 
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = "http://assets.example.com"
 
-  # Precompile additional assets (application.js, application.css, and all non-JS/CSS are already added)
+  # Precompile additional assets.
+  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
   # config.assets.precompile += %w( search.js )
 
-  # Disable delivery errors, bad email addresses will be ignored
+  # Ignore bad email addresses and do not raise email delivery errors.
+  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false
 
-  # Enable threaded mode
-  # config.threadsafe!
-
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found)
+  # the I18n.default_locale when a translation can not be found).
   config.i18n.fallbacks = true
 
-  # Send deprecation notices to registered listeners
+  # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
 
-  config.eager_load = true
+  # Disable automatic flushing of the log to improve performance.
+  # config.autoflush_log = false
+
+  # Use default logging formatter so that PID and timestamp are not suppressed.
+  config.log_formatter = ::Logger::Formatter.new
 end

--- a/config/environments/test.rb	Wed May 08 00:18:36 2013 +0900
+++ b/config/environments/test.rb	Wed May 08 00:29:54 2013 +0900
@@ -1,5 +1,5 @@
 Zeropaste::Application.configure do
-  # Settings specified here will take precedence over those in config/application.rb
+  # Settings specified here will take precedence over those in config/application.rb.
 
   # The test environment is used exclusively to run your application's
   # test suite. You never need to work with it otherwise. Remember that
@@ -7,27 +7,30 @@
   # and recreated between test runs. Don't rely on the data there!
   config.cache_classes = true
 
-  # Configure static asset server for tests with Cache-Control for performance
-  config.serve_static_assets = true
+  # Do not eager load code on boot. This avoids loading your whole application
+  # just for the purpose of running a single test. If you are using a tool that
+  # preloads Rails for running tests, you may have to set it to true.
+  config.eager_load = false
+
+  # Configure static asset server for tests with Cache-Control for performance.
+  config.serve_static_assets  = true
   config.static_cache_control = "public, max-age=3600"
 
-  # Show full error reports and disable caching
+  # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
 
-  # Raise exceptions instead of rendering exception templates
+  # Raise exceptions instead of rendering exception templates.
   config.action_dispatch.show_exceptions = false
 
-  # Disable request forgery protection in test environment
-  config.action_controller.allow_forgery_protection    = false
+  # Disable request forgery protection in test environment.
+  config.action_controller.allow_forgery_protection = false
 
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
 
-  # Print deprecation notices to the stderr
+  # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
-
-  config.eager_load = false
 end