What are some Ruby on Rails gems that can improve application performance?

What are some Ruby on Rails gems that can improve application performance?

There are several gems that can help enhance performance in Ruby on Rails applications. Some popular ones include:

1. Bullet - Helps to reduce N+1 queries and unused eager loading.
2. Rack::Cache - Provides HTTP caching for your application.
3. Dalli - A high-performance memcached client for caching.
4. ActiveRecord::QueryTrace - Helps to identify slow queries in your application.
5. Oj - A fast JSON parser and serializer. Would you like more details on any of these?

Yes, can you explain how Bullet works?

Sure! Bullet is a gem that helps you optimize your ActiveRecord queries by identifying N+1 queries and unused eager loading. It provides notifications in your development log and can even alert you in the browser. By using Bullet, you can significantly reduce the number of database queries, which improves the overall performance of your application.

How do I install Bullet in my Rails app?

To install Bullet, add it to your Gemfile:

gem 'bullet'

Then run bundle install. After that, you can configure Bullet in your config/environments/development.rb file to enable notifications and set up the desired options.

Are there any performance gems that work well with background jobs?

Yes, gems like Sidekiq and Resque are excellent for managing background jobs efficiently. They help in processing jobs asynchronously, which can significantly improve the responsiveness of your application.