In high-load applications, caching plays a critical role and is used almost everywhere in the web, from static resources such as web pages, images, and stylesheets, to pure data such as the result of database queries. In this section, we are going to learn how caching applies to asynchronous operations and how a high request throughput can be turned to our advantage.
Before we start diving into this new challenge, let's implement a small demo server that we will use as a reference to measure the impact of the various techniques we are going to implement.
Let's consider a web server that manages the sales of an e-commerce company, in particular, we want to query our server for the sum of all the transactions of a particular type of merchandise. For this purpose, we are going to use LevelUP again for its simplicity and flexibility. The data model that we are going to use is a simple list of transactions stored...