Performance Issues with Large JSON Responses in Rails 7 Using ActiveModel Serializers
I'm working on a Rails 7 application where I need to return a large JSON response that includes nested resources. Initially, I used ActiveModel Serializers to format the output, but I've been encountering significant performance issues, especially when the dataset grows larger. The response times can exceed 5 seconds, which is unacceptable for our users. I've tried optimizing the serializers by including only the necessary attributes and using `include` to preload associated records, but the performance is still sluggish. Here’s a snippet of my serializer setup: ```ruby class UserSerializer < ActiveModel::Serializer attributes :id, :name, :email, :created_at has_many :posts end class PostSerializer < ActiveModel::Serializer attributes :id, :title, :content, :created_at end ``` And in my controller, I’m fetching the users like this: ```ruby class UsersController < ApplicationController def index @users = User.includes(:posts).all render json: @users, each_serializer: UserSerializer end end ``` Despite using `includes`, I still notice multiple queries being executed when I inspect the logs, and I sometimes get a `ActiveRecord::QueryCanceled` error due to timeouts when the database is under load. I've also considered paginating the results, but even then, the initial loading time for the first batch seems delayed. Is there a more efficient way to handle serialization in this case? Or should I be considering another approach like using a different gem for JSON rendering or caching the responses? Any advice would be greatly appreciated!