You will learn how to improve execution time, download, interaction with the DOM, page life cycle, and more. Zakas and five other experts JavaScript - Ross Harmes, Julien Lecomte, Steven Levithan, Stoyan Stefanov, and Matt Sweeney - demonstrate the optimal way to load code into the page, and offers tips to help your JavaScript programs run efficiently and quickly as possible. You will learn best practices to build and deploy your files to the production environment, and tools that can help you find a problem once your site is displayed. Identify the trouble codes and use alternatives more quickly to accomplish the same task Improve script by learning how to store and access data JavaScript Implement JavaScript code so as not to slow down the interaction with DOM Use optimization techniques to improve runtime performance Learn the ways to ensure the UI responsive at all times Achieve faster client-server communication Use the build system to minimize the file, and HTTP compression to deliver them to your browser