performance-check
效能檢查技能
本技能提供 PHP/Laravel 應用程式的效能審查指引,聚焦於資料庫優化、記憶體管理與快取策略。
資料庫效能
N+1 查詢問題
嚴重程度: 🟡 高
檢測模式:
// ❌ N+1 問題 - 每次迴圈都查詢
$users = User::all();
foreach ($users as $user) {
echo $user->posts->count(); // 每次迴圈產生一次查詢
}
// ✅ 預載入 - 只有 2 次查詢
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