Best Practices for Optimizing Rails Performance in Larger Applications

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Hello Rails Community! :wave:

I’m working on a growing Rails application, and as the codebase and traffic scale, I’ve started noticing some performance bottlenecks, particularly in database queries and page load times.

I’d love to hear your tips, tricks, or best practices for keeping a Rails app running smoothly as it grows. Specifically, I’m curious about:

  1. Query Optimization: What are your go-to tools or methods for identifying and improving slow ActiveRecord queries?
  2. Caching Strategies: How do you decide between fragment caching, Russian doll caching, and other approaches?
  3. Background Jobs: What tools do you recommend for managing background jobs efficiently, especially for tasks like email sending or API calls?
  4. General Advice: Any lessons you’ve learned from scaling Rails apps that you wish you knew earlier?

Looking forward to learning from this amazing community! :rocket:

Thanks in advance for sharing your insights.

Cheers,