THE FAST RETRO BLOG

I am building Fast Retro in public. Follow along for updates and insights on the journey.

Feb 08, 2026

How We Improved Rails Response Times by 87%

We added Prometheus monitoring to Fast Retro and immediately spotted controllers with 200-400ms p95 latency. Here's how we traced them to N+1 queries and cut response times by up to 90%.

How to Integrate AWS SES with Ruby on Rails

Learn how to configure Amazon SES with Ruby on Rails using the aws-actionmailer-ses gem. This guide covers everything from IAM user setup and ActionMailer configuration to sending your first test email via the Rails console.