Laravel 9: implementing Eloquent's eager loading and performance when fetching related models
Quick question that's been bugging me - I'm experiencing important performance optimization when using Eloquent's eager loading in Laravel 9. I have two models, `Post` and `Comment`, with a one-to-many relationship where a `Post` can have many `Comments`. When I try to fetch posts along with their comments using eager loading, the query seems to be running slower than expected. Here's the code I'm using: ```php $posts = Post::with('comments')->get(); ``` While this should ideally execute just two queries, I noticed it's taking a long time when there are a lot of comments associated with the posts. I also checked the generated SQL queries and they seem to be correctly formed. Here's how the relationships are defined: ```php class Post extends Model { public function comments() { return $this->hasMany(Comment::class); } } class Comment extends Model { public function post() { return $this->belongsTo(Post::class); } } ``` I tried using the `chunk` method to reduce memory usage by processing posts in smaller batches: ```php Post::with('comments')->chunk(100, function($posts) { // process posts }); ``` However, the performance scenario continues. Additionally, I checked the database indexes and found that I indeed have an index on the `post_id` in the `comments` table, so that's not the question. To further debug, I used Laravel's query logging and found that when the number of comments per post increases, the time taken for the eager loading grows exponentially. Is there a better way to optimize this or any best practices I might be missing? Also, would using `lazy loading` instead of eager loading in some cases be more efficient? Any suggestions would be appreciated! What am I doing wrong?