Auditing and improving Rails Performance – Turing

Auditing and improving Rails Performance

Turing

Osama Alghanmi / @itechdom

What's performance optimization

• Improving the speed of our application

• Reduce areas in the application that are causing issues in performance

• Some techniques to improve performance

  • Caching
  • Memory Optimization: Code that consumes a lot of memory. https://www.airpair.com/ruby-on-rails/performance
  • Background workers: next lesson
  • Improving Active Record Queries
  • Outside of Rails: Load balancer, hosting assets on an external server, front-end optimization.

• We should look at the biggest wins in our application

Skylight

• What's Skylight?

• https://www.skylight.io

Setup

• Clone this repo:

  git clone https://github.com/turingschool-examples/storedom.git

• checkout branch: heroku-ready

• run:

  heroku create && 
  git push heroku heroku-ready:master &&
  heroku run rake db:setup

• Create an Account on Skylight

• Add gem 'skylight'

• bundle install

• bundle exec skylight setup "copy this part from skylight"

• Deploy your app to Heroku

• Navigate to the first page, then go and check Skylight's Dashboard.

Live Code

• Let's look for the biggest wins.
• Limit the number of orders displayed in the orders controller
• Check the performance difference.

Exercise

• Install Skylight for your Pivot or Feed engine.
• Navigate through your app.
• Write down the three slowest actions in your app.
• Think about how you could improve these three areas.

Resources

• http://www.slideshare.net/smetana/performance-optimization-of-rails-applications: comprehensive slides on performance optimization