Authentication is one of the key aspects of many web applications. It is the process of identifying a person before granting them access to the application. It is very important that the authentication approach is secure and easy to use for all users. What is passwordless authentication? Passwordless authentication is a verification process that determines whether an individual is who they claim to be, without coercion. You do not require credentials to log in. All you need is an email address or phone number associated with an account and you will get a magic link or one-time password each time

Most of the time in a web application, a single API request consists of multiple database queries. For example: class DashboardsController < ApplicationController def dashboard @users = User.some_complex_scope.load_async @products = Product.some_complex_scope.load_async @library_files = LibraryFile.some_complex_scope.load_async end end Quoting snippet from load_async PR description from rails repository. The queries are executed synchronously, which mostly isn’t a huge concern. But, as the database grows larger in size, the response time of requests is getting longer. A significant part of the query time is often just I/O waits.