Critical, documentation-validated performance optimization analysis (6-phase protocol) that MAY modify source code for speed while preserving behavior. Use when the user EXPLICITLY asks to optimize or profile for performance — "optimize this", "make it faster", "improve performance", "profile", "reduce latency", "this is slow". NOT for: general readability refactoring (use refactor), bug fixing, or read-only review; do not auto-invoke to mutate code for performance unless explicitly asked.
