Laravel
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Laravel Eloquent Masterclass: Eager Loading & Query Optimization
Prevent N+1 query performance bottlenecks in Laravel apps using eager loading, lazy eager loading, and subquery selections.
Diagnosing & Resolving Database Bottlenecks
The N+1 query bug occurs when an application executes one query to retrieve a dataset, followed by N separate queries to fetch related models inside a loop.
Before Eager Loading (N+1 Problem):
$posts = Post::all(); // 1 Query
foreach ($posts as $post) {
echo $post->category->name; // N Queries!
}
After Eager Loading (Optimal 2 Queries):
$posts = Post::with('category')->get();
foreach ($posts as $post) {
echo $post->category->name; // Zero additional queries!
}
Utilizing withCount() and selectSub() further optimizes memory allocation when dealing with large-scale relational datasets.