Performance Optimization

Do not optimize by instinct. Start with measurement, change one thing at a time, and confirm the result with the same metric you used at the beginning.

When to Use

• A user or monitoring system reports a slow page, endpoint, query, or job
• A new feature needs a performance baseline before release
• You suspect a regression and need evidence before changing code
• A hot path is doing real work at scale and latency or throughput matters

When NOT to Use