#368 MiniProfiler

Jul 24, 2012 | 9 minutes | Performance, Tools, Plugins

MiniProfiler allows you to see the speed of a request conveniently on the page. It also shows the SQL queries performed and allows you to profile a specific block of code.

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          Gemfile
        
gem 'rack-mini-profiler'

          products/index.html.erb
        
<%= pluralize project.tasks.size, "task" %>

          projects_controller.rb
        
@projects = Project.order(:created_at).select("projects.*, count(tasks.id) as tasks_count").joins("left outer join tasks on project_id=projects.id").group("projects.id")
Rack::MiniProfiler.step("fetch projects") do
  @projects.all
end

          config/environments/production.rb
        
config.serve_static_assets = true

          terminal
        
rake assets:precompile
rake db:setup RAILS_ENV=production
rails s -e production

          application_controller.rb
        
before_filter :miniprofiler

private

def miniprofiler
  Rack::MiniProfiler.authorize_request # if user.admin?
end