Chapter 10: Improving Performance and Scalability

In this chapter, we are going to improve the performance and scalability of our REST API. When we make each improvement, we'll use a load testing tool to verify that there has been an improvement.

We'll start by focusing on database calls and how we can reduce the number of calls to improve performance. We'll then move on to requesting less data with data paging. We'll also look at the impact that caching data in memory has on performance.

Then, we'll learn how to make our API controllers and data repository asynchronous. We'll eventually understand whether this makes our REST API more performant or perhaps more scalable. 

In this chapter, we'll cover the following topics:

• Reducing database round trips
• Paging data
• Making API controllers asynchronous
• Caching data

At the end of this chapter, we'll have the knowledge to implement fast REST...