Book Image

Learning TypeScript 2.x - Second Edition

By : Remo H. Jansen
Book Image

Learning TypeScript 2.x - Second Edition

By: Remo H. Jansen

Overview of this book

TypeScript is an open source and cross-platform statically typed superset of JavaScript that compiles to plain JavaScript and runs in any browser or host. This book is a step-by-step guide that will take you through the use and benefits of TypeScript with the help of practical examples. You will start off by understanding the basics as well as the new features of TypeScript 2.x. Then, you will learn how to work with functions and asynchronous programming APIs. You will continue by learning how to resolve runtime issues and how to implement TypeScript applications using the Object-oriented programming (OOP) and functional programming (FP) paradigms. Later, you will automate your development workflow with the help of tools such as Webpack. Towards the end of this book, you will delve into some real-world scenarios by implementing some full-stack TypeScript applications with Node.js, React and Angular as well as how to optimize and test them. Finally, you will be introduced to the internal APIs of the TypeScript compiler, and you will learn how to create custom code analysis tools.
Table of Contents (17 chapters)

Common performance metrics

Performance can be affected by the availability of multiple types of physical and virtual devices. This explains the existence of multiple performance metrics (factors to measure performance). Some popular performance metrics include availability, response time, processing speed, latency, bandwidth, and scalability. These measurement mechanisms are usually directly related to one of the general resources (such as CPU, network throughput and so on) that were listed in the preceding section. We will now look at each of these performance metrics in detail.

Availability

If a system is not available at some stage, even if it is only partially unavailable, we will perceive it as bad performance. The availability...