你将会了解如何提升各方面的性能，包括代码的加载、运行、DOM交互、页面生存周期等。雅虎的前端工程师Nicholas C. Zakas和其他五位Javascr ipt专家介绍了页面代码加载的最佳方法和编程技巧，来帮助你编写更为高效和快速的代码。你还会了解到构建和部署文件到生产环境的最佳实践，以及有助于定位线上问题的工具。(You will know how to improve the performance of all aspects, including code loading, running, DOM interaction, page lifecycle, and so on. YAHOO front-end Engineer Nicholas C. Zakas and five other Javascr ipt experts have introduced the best way and programming skills of page code loading to help you write more efficient and fast code. You will also understand the best practices for building and deploying files to the production environment, and tools that help locate online problems.)