added profile environment for perftools profiling (1.9.3 only)

Gemfile

@@ -108,3 +108,8 @@ end
 #  If you want to amend mini profiler to do the monkey patches in the railstie
 #  we are open to it.
 gem 'rack-mini-profiler', git: 'git://github.com/SamSaffron/MiniProfiler'
+
+# perftools only works on 1.9 atm
+group :profile do
+  gem 'rack-perftools_profiler', require: 'rack/perftools_profiler', platform: :mri_19 
+end

Gemfile.lock

@@ -307,9 +307,11 @@ GEM
     omniauth-twitter (0.0.14)
       multi_json (~> 1.3)
       omniauth-oauth (~> 1.0)
+    open4 (1.3.0)
     openid-redis-store (0.0.2)
       redis
       ruby-openid
+    perftools.rb (2.0.0)
     pg (0.14.1)
     polyglot (0.3.3)
     progress (2.4.0)
@@ -325,6 +327,10 @@ GEM
     rack-openid (1.3.1)
       rack (>= 1.1.0)
       ruby-openid (>= 2.1.8)
+    rack-perftools_profiler (0.6.0)
+      open4 (~> 1.0)
+      perftools.rb (~> 2.0.0)
+      rack (~> 1.0)
     rack-protection (1.3.2)
       rack
     rack-ssl (1.3.3)
@@ -514,6 +520,7 @@ DEPENDENCIES
   pg
   pry-rails
   rack-mini-profiler!
+  rack-perftools_profiler
   rails
   rails_multisite!
   rake

app/models/topic.rb

@@ -123,6 +123,7 @@ class Topic < ActiveRecord::Base
     return title unless SiteSetting.title_fancy_entities?
 
     # We don't always have to require this, if fancy is disabled
+    # see: http://meta.discourse.org/t/pattern-for-defer-loading-gems-and-profiling-with-perftools-rb/4629 
     require 'redcarpet' unless defined? Redcarpet
 
     Redcarpet::Render::SmartyPants.render(title)

config/application.rb

@@ -7,7 +7,7 @@ require './lib/discourse_plugin_registry'
 
 if defined?(Bundler)
   # If you precompile assets before deploying to production, use this line
-  Bundler.require(*Rails.groups(:assets => %w(development test)))
+  Bundler.require(*Rails.groups(:assets => %w(development test profile)))
   # If you want your assets lazily compiled in production, use this line
   # Bundler.require(:default, :assets, Rails.env)
 end

config/database.yml.sample

@@ -30,3 +30,13 @@ production:
   timeout: 5000
   host_names:
     - production.localhost # Update this to be the domain of your production site
+
+profile:
+  adapter: postgresql
+  database: discourse_development
+  min_messages: warning
+  host: localhost
+  pool: 5
+  timeout: 5000
+  host_names:
+    - "localhost"

config/environments/profile.rb

@@ -0,0 +1,45 @@
+Discourse::Application.configure do
+  # Settings specified here will take precedence over those in config/application.rb
+
+  # Code is not reloaded between requests
+  config.cache_classes = true
+
+  # Full error reports are disabled and caching is turned on
+  config.consider_all_requests_local       = false
+  config.action_controller.perform_caching = true
+
+  # in profile mode we serve static assets
+  config.serve_static_assets = true
+
+  # Compress JavaScripts and CSS
+  config.assets.compress = true
+
+  # stuff should be pre-compiled, allow compilation to make life easier
+  config.assets.compile = true
+
+  # Generate digests for assets URLs
+  config.assets.digest = true
+
+  # Specifies the header that your server uses for sending files
+  config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
+
+  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
+  # the I18n.default_locale when a translation can not be found)
+  config.i18n.fallbacks = true
+
+  config.action_mailer.delivery_method = :sendmail
+  config.action_mailer.sendmail_settings = {arguments: '-i'}
+
+  # Send deprecation notices to registered listeners
+  config.active_support.deprecation = :notify
+
+  # I dunno ... perhaps the built-in minifier is using closure
+  #   regardless it is blowing up
+  config.ember.variant = :development
+  config.ember.ember_location = "#{Rails.root}/app/assets/javascripts/external_production/ember.js"
+  config.ember.handlebars_location = "#{Rails.root}/app/assets/javascripts/external/handlebars-1.0.rc.3.js"
+  config.handlebars.precompile = true
+
+  config.middleware.use ::Rack::PerftoolsProfiler, :default_printer => 'gif'
+
+end

config/initializers/secret_token.rb

@@ -10,7 +10,7 @@
 # Discourse::Application.config.secret_token = "SET_SECRET_HERE"
 
 # delete all lines below in production
-if Rails.env.test? || Rails.env.development?
+if Rails.env.test? || Rails.env.development? || Rails.env == "profile"
   Discourse::Application.config.secret_token = "47f5390004bf6d25bb97083fb98e7cc133ab450ba814dd19638a78282b4ca291"
 else
   raise "You must set a secret token in ENV['SECRET_TOKEN'] or in config/initializers/secret_token.rb" if ENV['SECRET_TOKEN'].blank?

config/redis.yml.sample

@@ -7,6 +7,9 @@ defaults: &defaults
 development:
   <<: *defaults
 
+profile:
+  <<: *defaults
+
 test:
   <<: *defaults 
   db: 1