Performance Smell Detection Skill Identify potential code-level performance issues in Java code. Philosophy "Premature optimization is the root of all evil" - Donald Knuth This skill helps you notice potential performance smells, not blindly "fix" them. Modern JVMs (Java 21/25) are highly optimized. Always: 1. Measure first - Use JMH, profilers, or production metrics 2. Focus on hot paths - 90% of time spent in 10% of code 3. Consider readability - Clear code often matters more than micro-optimizations When to Use - Reviewing performance-critical code paths - Investigating measured performanc…