Analyzes render efficiency by detecting wasted renders.

A "wasted render" is a render event with no state changes. This indicates the LiveView re-rendered unnecessarily.

Thresholds

• Warning: 3+ wasted renders
• Critical: >30% of renders are wasted

Output

%{
  findings: [
    %{
      severity: :critical,
      message: "3 of 5 renders (60%) had no state changes",
      events: [2, 4, 5],
      metadata: %{wasted_count: 3, total_count: 5}
    }
  ],
  stats: %{
    render_count: 5,
    wasted_render_count: 3,
    efficiency_ratio: 0.4
  }
}