Book Image

Express Web Application Development

By : Hage Yaaapa
Book Image

Express Web Application Development

By: Hage Yaaapa

Overview of this book

Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications. It provides a thin layer of features fundamental to any web application, without obscuring features that developers know and love in node.js. "Express Web Application Development" is a comprehensive guide for those looking to learn how to use the Express web framework for web application development. Starting with the initial setup of the Express web framework, "Express Web Application Development" helps you to understand the fundamentals of the framework. By the end of "Express Web Application Development", you will have acquired enough knowledge and skills to create production-ready Express apps. All of this is made possible by the incremental introduction of more advanced topics, starting from the very essentials. On the way to mastering Express for application development, we teach you the more advanced topics such as routes, views, middleware, forms, sessions, cookies and various other aspects of configuring an Express application. Jade; the recommended HTML template engine, and Stylus; the CSS pre-processor for Express, are covered in detail. Last, but definitely not least, Express Web Application Development also covers practices and setups that are required to make Express apps production-ready.
Table of Contents (15 chapters)
Express Web Application Development
About the Author
About the Reviewers

Benchmarking the app

Performance is one of the primary concerns when it comes to making an app production-ready. Since a major section of this chapter is about making our app performant, it makes sense to know right at the beginning how to quantitatively measure the performance of our app.

We will use a command-line tool called siege for benchmarking our app. While it is not going to be the most scientific and accurate method, benchmarking with siege will give us a fair idea about how well our app is performing.

Here is how to install siege in Ubuntu:

$ sudo apt-get install siege

To start benchmarking an app located at http://localhost:3000/, we would benchmark it this way:

$ siege -b -c100 -t10S http://localhost:3000/

Basically, we are performing a tiny denial of service (DoS) attack on our server and seeing how well it fares.

The options used in the command are listed as follows:




To indicate we are benchmarking the app. No delays between requests.