Code Review

Code reviews are crucial for maintaining code quality, knowledge sharing, and team growth.

Purpose of Code Reviews

• Catch bugs and logic errors early
• Ensure code quality and consistency
• Share knowledge across the team
• Improve overall codebase maintainability

Review Checklist

Functionality

• Does the code do what it's supposed to do?
• Are edge cases handled?
• Is error handling appropriate?

Code Quality

• Is the code readable and maintainable?
• Are naming conventions followed?
• Is there unnecessary complexity?
• Are there code smells?

Testing

• Are there adequate tests?
• Do tests cover edge cases?
• Are tests meaningful and maintainable?

Performance

• Are there obvious performance issues?
• Are database queries optimized?
• Is caching used appropriately?

Security

• Are there security vulnerabilities?
• Is user input validated?
• Are secrets properly managed?

Best Practices

For Authors

• Keep changes small and focused
• Provide context in the PR description
• Self-review before requesting review
• Be open to feedback

For Reviewers

• Be respectful and constructive
• Explain the "why" behind suggestions
• Distinguish between blocking and non-blocking comments
• Respond in a timely manner

Review Comments

Good Examples

"Consider using a Set here for O(1) lookups instead of O(n) 
with array.includes(). This will improve performance when 
the array grows large."

Avoid

"This is wrong."
"Why did you do it this way?"

Automation

Use automated tools to catch common issues:

• Linters (ESLint, Biome)
• Formatters (Prettier)
• Type checkers (TypeScript)
• Security scanners