Quality

The practices that keep code correct and fast as it changes: catching defects in review, finding them systematically when they slip through, and optimizing only where measurement justifies it.

For the testing discipline itself — strategy, testable design, and automation — see Testing.

Topics

• Code Review — A discipline for reviewing code that catches defects, transfers knowledge, and raises the standard of the codebase.
• Debugging — A systematic discipline for finding and fixing defects.
• Performance — When to optimize, how to measure, and which trade-offs are worth making.