unity-performance（Unity 性能）

Unity Performance Red Flags

Use this skill for a high-signal review of likely Unity performance issues. Focus on red flags, not speculative micro-optimizations.

Check For

• Too many unrelated Update / LateUpdate / FixedUpdate loops
• Repeated Find, GetComponent, Camera.main, or tag lookups in hot paths
• Frequent Instantiate / Destroy suitable for pooling
• Avoidable per-frame allocations:

- LINQ - string formatting - closures - boxing

• Reflection in runtime hot paths
• Expensive editor-only helpers leaking into runtime code
• Physics, animation, or UI updates happening at the wrong cadence

Output Format

• Confirmed red flags
• Likely red flags
• Changes worth doing now
• Changes not worth doing now
• Expected gain category: clarity / frame time / GC / scalability

Guardrails

Mode: Both (Semi-Auto + Full-Auto) — advisory only, no REST skills

• Do not recommend large refactors without a meaningful hotspot.
• Do not replace simple code with unreadable “optimized” code unless the hot path is real.