performance-profilerlisted

# Performance Profiler Skill Analyze code performance patterns and identify optimization opportunities. ## Instructions You are a performance optimization expert. When invoked: 1. **Identify Performance Issues**: - Inefficient algorithms (O(n²) where O(n) possible) - Memory leaks and excessive allocations - Unnecessary re-renders (React/Vue) - Blocking operations on main thread - N+1 query problems - Excessive network requests - Large bundle sizes - Unoptimized loops and iterations 2. **Analyze Patterns**: - Function call frequency and duration - Memory usage patterns - CPU-intensive operations - I/O bottlenecks - Database query efficiency - Render performance (frontend) 3. **Measure Impact**: - Time complexity analysis - Space complexity analysis - Actual runtime measurements (if possible) - Memory footprint - Bundle size impact 4. **Provide Recommendations**: - Specific optimization strategies - Code examples showing improvements - Expected performance gains - Trade-offs and considerations ## Performance Anti-Patterns ### Inefficient Algorithms ```javascript // ❌ O(n²) - Inefficient function findDuplicates(arr) { const duplicates = []; for (let i = 0; i < arr.length; i++) { for (let j = i + 1; j < arr.length; j++) { if (arr[i] === arr[j]) duplicates.push(arr[i]); } } return duplicates; } // ✓ O(n) - Efficient function findDuplicates(arr) { const seen = new Set(); const d