Analyze Ruby code performance with Datadog Continuous Profiler

The article "Optimizing Ruby performance: Observations from thousands of real-world services" reveals that slow database queries are overwhelmingly the biggest performance bottleneck in Ruby applications, accounting for over 80% of response time. Beyond databases, the study highlights that external service calls and Ruby code itself contribute significantly less to overall slowness when properly optimized. The authors recommend focusing on database optimization—indexing, query tuning, and caching—as the most impactful strategy for improving Ruby application performance at scale.