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

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