Testing & Debugging Guides
// 3 in-depth guides — written for developers who have to pick an approach and live with it
In-depth guides
How to Debug Performance Issues by Measuring Before Guessing
Finding the actual bottleneck with profiling, query plans, and p99 latency — why averages hide the problem and N+1 queries are almost always the answer.
6 min readHow to Write Unit Tests Worth Maintaining
Testing behaviour instead of implementation, what to mock and what not to, and why 100% coverage on a codebase with no integration tests proves almost nothing.
6 min readHow to Set Up Error Monitoring You Don't Learn to Ignore
Structured logging, error tracking, and alerting that means something — grouping, source maps, scrubbing PII, and why alerting on every error trains you to ignore alerts.
6 min read