Laravel 10: Difficulty with Eager Loading Nested Relationships and Performance Degradation
I'm experiencing a significant performance hit when trying to eager load nested relationships in my Laravel 10 project. My model structure is relatively straightforward: I have a `Post` model that has many `Comment` models and each `Comment` can belong to a `User`. When I attempt to retrieve posts with their comments and the associated users using eager loading, the response times are noticeably slow. Here's how I structured my query: ```php $posts = Post::with('comments.user')->get(); ``` This works, but the response time is over 3 seconds, which feels excessive. I suspect it's related to the way I'm retrieving data, especially since I have around 10,000 posts and each post can have multiple comments. I've tried optimizing the query by using `select` to limit the columns being retrieved: ```php $posts = Post::with(['comments:user_id,post_id,content', 'comments.user:id,name'])->get(); ``` Yet, it didn’t seem to make a significant difference. I've also checked my database indexes, ensuring that the `post_id` in the `comments` table and the `user_id` in the `users` table are indexed. Additionally, I've noticed that if I only load the posts without comments, the response time is much faster. I'm left wondering if there's an inherent limitation with eager loading in this scenario, or if there's something I'm missing in terms of query optimization. Any advice on how to improve the performance of this eager loading operation would be greatly appreciated! This is part of a larger web app I'm building. Is there a better approach?