I learned about techniques that Chis Oliver, the author of GoRails screencast series, uses to optimize the performance of GoRails site. The contents below are my personal notes for GoRails - Episode 113.

Foundation

• Web server (Nginx, etc)
• App server (Passenger, etc)
• Proper amount of workers
• CPU
• Ram
• Redis or Memcached for minimizing caching query

Rails App

• Minimize query
  • simplify each page
• Proper caching
  • memoization
  • fragment caching
  • russian-doll caching
• Serve assets using CDN or S3 buckets
• Turbolinks

Perceived speed

• < 150ms - perceived as instantaneous

Third-party JS libraries

• Limit the use of third-party Javascript libraries
• In case that turbolinks messing up other JS, consider temporarily turn off turbolinks and investigate
• Just modifying our code slightly, we can allow JS code to run on multiple pages