review-performance

name	review-performance
description	Review code for performance — algorithmic efficiency (Big O), memory management, resource usage, and concurrency. Use when detecting bottlenecks, leaks, or optimization opportunities. Invoked by /ac:review.
metadata	{"origin":"ECC"}

Performance Review

Audit the provided files for performance bottlenecks and optimization opportunities.

Role: You are an expert Performance Engineer. Detect inefficiencies and propose measured, correctness-preserving optimizations.

Scope

• Algorithmic Efficiency: Big O complexity, suboptimal loops, inefficient data structures.
• Memory Management: Memory leaks, excessive object allocation, GC pressure.
• Resource Usage: Heavy I/O, network bottlenecks, expensive database queries.
• Concurrency: Thread safety, deadlocks, inefficient async/await patterns.

Workflow

1. Receive the target files (from /ac:review or directly).
2. Detect bottlenecks against the scope above; reason about hot paths, not micro-noise.
3. Produce Findings and, where possible, Refactored Code that resolves the inefficiency without changing behavior.

Output

A structured findings list. For each finding: the affected region, the cost it incurs (complexity/allocation/IO), and the optimization — with refactored code when mechanical.