Pro JavaScript Performance: Monitoring and Visualization

Book Description

Performance is a hugely important area of web development. If your site runs slowly, users are going to leave, and the problem only grows as your site gets more popular. Pro JavaScript Performance gives you the tools you need to keep your sites smooth and responsive no matter how many users you have.

Best practices are changing or becoming redefined continually because of changes and optimizations at the interpreter level, and differences in system configuration, and network speeds.  This is exacerbated by the quickened release schedule that most browsers have adopted. Just as important as following best practices is the ability to measure your own performance, so that you can adjust as times change, and so that you can note the subtle nuances in your own code and define your own best practices by your own observations.

This book gives you the tools to observe and track the performance of your web applications over time from multiple perspectives, so that you are always aware of, and can fix, all aspects of your performance.

What you’ll learn

• Describes the different aspects of performance, and explores the tools for quantifying and improving performance
• Provides tactical solutions for creating tools to measure the performance of your own web applications
• Learn to apply performance best practices, and how to quantify your results

Who this book is for

Pro JavaScript Performance is written for advanced JavaScript users and web developers. You will need a strong understanding of JavaScript to get the most from this book.

Table of Contents

1. What Is Performance?
2. Tools and Technology to Measure and Impact Performance
3. WPTRunner—Automated Performance Monitoring and Visualization with WebPagetest
4. perfLogger—JavaScript Benchmarking and Logging
5. Looking Forward, A Standard for Performance
6. Web Performance Optimizations
7. Runtime Performance
8. Balancing Performance with Software Engineering Best Practices and Running in Production

Table of Contents

Chapter 1: What is Performance
Chapter 2: Tools and Technology to Measure and Impact Performance
Chapter 3: WPTRunner—Automated Performance Monitoring and Visualization with WebPagetest
Chapter 4: perfLogger—JavaScript Benchmarking and Logging
Chapter 5: Looking Forward, a Standard for Performance
Chapter 6: Web Performance Optimizations
Chapter 7: Runtime Performance
Chapter 8: Balancing Performance with Software Engineering Best Practices and Running in Production

中文：

书名：Pro JavaScript Performance: Monitoring and Visualization

性能是Web开发的一个非常重要的领域。如果你的网站运行缓慢，用户就会离开，而且这个问题只会随着你的网站变得更受欢迎而加剧。 专业的JavaScript性能 为您提供所需的工具，使您的网站保持顺畅和响应能力，无论您有多少用户。

由于解释器级别的变化和优化，以及系统配置和网络速度的差异，最佳实践正在不断变化或重新定义。但大多数浏览器都采用了更快的发布时间表，这加剧了这一点。与遵循最佳实践一样重要的是能够测量您自己的性能，以便您可以随着时间的变化进行调整，从而您可以注意到您自己代码中的细微差别，并通过您自己的观察来定义您自己的最佳实践。

这本书为您提供了从多个角度观察和跟踪Web应用程序随时间推移的性能的工具，以便您始终了解并修复您的性能的各个方面。

What you’ll learn

• 描述性能的不同方面，并探索量化和改进性能的工具
• 提供战术性解决方案，用于创建工具来测量您自己的Web应用程序的性能
• 学习应用性能最佳实践，以及如何量化您的结果

这本书是为谁而写的

专业的JavaScript性能 是为高级JavaScript用户和Web开发人员编写的。您需要对Java脚本有很好的理解，才能从本书中获得最大的收获。

Table of Contents

1. 什么是性能？
2. 衡量和影响绩效的工具和技术
3. WPTRunner-使用WebPagetest进行自动化性能监控和可视化
4. PerformLogger–JavaScript基准和日志记录
5. 展望未来–业绩的标准
6. Web Performance Optimizations
7. 运行时性能
8. Balancing Performance with Software Engineering Best Practices and Running in Production

Table of Contents

第1章：什么是性能
第2章：衡量和影响绩效的工具和技术
第3章：WPTRunner-使用WebPagetest进行自动化性能监控和可视化
第4章：PerformLogger–JavaScript基准和日志记录
Chapter 5: Looking Forward, a Standard for Performance
第6章：Web性能优化
第7章：运行时性能
第8章：平衡性能与软件工程最佳实践并在生产中运行