更快速网站（影印版）
出版时间：2009年12月
页数：231
对于任何成功的网站来说，性能是至关重要的。但伴随着不断增长的丰富内容和Ajax的过度使用，如今的Web应用已经将浏览器推至性能极限。在本书中，Google的Web性能专家和前任雅虎首席网站性能官Steve Souders提供了宝贵的技术，来帮助你优化网站性能。
作者的上一本书是非常畅销的《High Performance Web Sites》，它透露了80%的网页加载时间是花在客户端，使网络开发世界为之震惊。在本书中，Souders和8位专家撰稿人提供了最佳实践和实用建议，用于在三个范畴提高网站的性能：
JavaScript——获取用于了解Ajax性能的建议，编写有效的JavaScript，创建响应程序，加载脚本时不阻止其他组件等等。
Network——学习穿过多个域共享资源，减小图片尺寸而不损失质量，以及使用分块编码（chunked encoding）来更快呈现页面。
Browser——探索内嵌框架（iframe）的替代方案、如何简化CSS选择器和其他技术。
对于当今的富媒体网站和Web 2.0应用来说，速度是至关重要的。有了这本书，你将学习到如何减少你的网站的加载时间，让它们响应得更快。
“本书拥有最近最新的专业知识，能使你的网站飞速运行。我喜欢这本书的编排，有许多主题，每一个都被该领域最受人尊敬的权威人士所探究。我的团队中的每个人都将拥有一本。”
—— Bill Scott，Netflix公司UI工程总监
Steve Souders在Google从事网络性能和开放源码计划方面的工作。他是YSlow （Firebug 性能分析扩展） 的创造者，并且担任Velocity（O’Reilly的网络性能和业务运营会议）的联合主席。Steve经常在会议上或者高级别公司中发言，包括微软、亚马逊、MySpace、LinkedIn、Facebook。
特约作者：
Dion Almaer, Douglas Crockford, Ben Galbraith, Tony Gentilcore, Dylan Schiemann, Stoyan Stefanov, Nicole Sullivan, and
Nicholas C. Zakas
作者的上一本书是非常畅销的《High Performance Web Sites》，它透露了80%的网页加载时间是花在客户端，使网络开发世界为之震惊。在本书中，Souders和8位专家撰稿人提供了最佳实践和实用建议，用于在三个范畴提高网站的性能：
JavaScript——获取用于了解Ajax性能的建议，编写有效的JavaScript，创建响应程序，加载脚本时不阻止其他组件等等。
Network——学习穿过多个域共享资源，减小图片尺寸而不损失质量，以及使用分块编码（chunked encoding）来更快呈现页面。
Browser——探索内嵌框架（iframe）的替代方案、如何简化CSS选择器和其他技术。
对于当今的富媒体网站和Web 2.0应用来说，速度是至关重要的。有了这本书，你将学习到如何减少你的网站的加载时间，让它们响应得更快。
“本书拥有最近最新的专业知识，能使你的网站飞速运行。我喜欢这本书的编排，有许多主题，每一个都被该领域最受人尊敬的权威人士所探究。我的团队中的每个人都将拥有一本。”
—— Bill Scott，Netflix公司UI工程总监
Steve Souders在Google从事网络性能和开放源码计划方面的工作。他是YSlow （Firebug 性能分析扩展） 的创造者，并且担任Velocity（O’Reilly的网络性能和业务运营会议）的联合主席。Steve经常在会议上或者高级别公司中发言，包括微软、亚马逊、MySpace、LinkedIn、Facebook。
特约作者：
Dion Almaer, Douglas Crockford, Ben Galbraith, Tony Gentilcore, Dylan Schiemann, Stoyan Stefanov, Nicole Sullivan, and
Nicholas C. Zakas
- Credits
- Preface
- 1. Understanding Ajax Performance
- Trade-offs
- Principles of Optimization
- Ajax
- Browser
- Wow!
- JavaScript
- Summary
- 2. Creating Responsive Web Applications
- What Is Fast Enough?
- Measuring Latency
- When Latency Goes Bad
- Threading
- Ensuring Responsiveness
- Web Workers
- Gears
- Timers
- Effects of Memory Use on Response Time
- Virtual Memory
- Troubleshooting Memory Issues
- Summary
- 3. Splitting the Initial Payload
- Kitchen Sink
- Savings from Splitting
- Finding the Split
- Undefined Symbols and Race Conditions
- Case Study: Google Calendar
- 4. Loading Scripts Without Blocking
- Scripts Block
- Making Scripts Play Nice
- XHR Eval
- XHR Injection
- Script in Iframe
- Script DOM Element
- Script Defer
- document.write Script Tag
- Browser Busy Indicators
- Ensuring (or Avoiding) Ordered Execution
- Summarizing the Results
- And the Winner Is
- 5. Coupling Asynchronous Scripts
- Code Example: menu.js
- Race Conditions
- Preserving Order Asynchronously
- Technique 1: Hardcoded Callback
- Technique 2: Window Onload
- Technique 3: Timer
- Technique 4: Script Onload
- Technique 5: Degrading Script Tags
- Multiple External Scripts
- Managed XHR
- DOM Element and Doc Write
- General Solution
- Single Script
- Multiple Scripts
- Asynchronicity in the Real World
- Google Analytics and Dojo
- YUI Loader Utility
- 6. Positioning Inline Scripts
- Inline Scripts Block
- Move Inline Scripts to the Bottom
- Initiate Execution Asynchronously
- Use Script Defer
- Preserving CSS and JavaScript Order
- Danger: Stylesheet Followed by Inline Script
- Inline Scripts Aren’t Blocked by Most Downloads
- Inline Scripts Are Blocked by Stylesheets
- This Does Happen
- 7. Writing Efficient JavaScript
- Managing Scope
- Use Local Variables
- Scope Chain Augmentation
- Efficient Data Access
- Flow Control
- Fast Conditionals
- Fast Loops
- String Optimization
- String Concatenation
- Trimming Strings
- Avoid Long-Running Scripts
- Yielding Using Timers
- Timer Patterns for Yielding
- Summary
- 8. Scaling with Comet
- How Comet Works
- Transport Techniques
- Polling
- Long Polling
- Forever Frame
- XHR Streaming
- Future Transports
- Cross-Domain
- Effects of Implementation on Applications
- Managing Connections
- Measuring Performance
- Protocols
- Summary
- 9. Going Beyond Gzipping
- Why Does This Matter?
- What Causes This?
- Quick Review
- The Culprit
- Examples of Popular Turtle Tappers
- How to Help These Users?
- Design to Minimize Uncompressed Size
- Educate Users
- Direct Detection of Gzip Support
- 10. Optimizing Images
- Two Steps to Simplify Image Optimization
- Image Formats
- Background
- Characteristics of the Different Formats
- More About PNG
- Automated Lossless Image Optimization
- Crushing PNGs
- Stripping JPEG Metadata
- Converting GIF to PNG
- Optimizing GIF Animations
- Smush.it
- Progressive JPEGs for Large Images
- Alpha Transparency: Avoid AlphaImageLoader
- Effects of Alpha Transparency
- AlphaImageLoader
- Problems with AlphaImageLoader
- Progressively Enhanced PNG8 Alpha Transparency
- Optimizing Sprites
- ?ber-Sprite Versus Modular Sprite
- Highly Optimized CSS Sprites
- Other Image Optimizations
- Avoid Scaling Images
- Crush Generated Images
- Favicons
- Apple Touch Icon
- Summary
- 11. Sharding Dominant Domains
- Critical Path
- Who’s Sharding?
- Downgrading to HTTP/1.0
- Rolling Out Sharding
- IP Address or Hostname
- How Many Domains
- How to Split Resources
- Newer Browsers
- 12. Flushing the Document Early
- Flush the Head
- Output Buffering
- Chunked Encoding
- Flushing and Gzip
- Other Intermediaries
- Domain Blocking During Flushing
- Browsers: The Last Hurdle
- Flushing Beyond PHP
- The Flush Checklist
- 13. Using Iframes Sparingly
- The Most Expensive DOM Element
- Iframes Block Onload
- Parallel Downloads with Iframes
- Script Before Iframe
- Stylesheet Before Iframe
- Stylesheet After Iframe
- Connections per Hostname
- Connection Sharing in Iframes
- Connection Sharing Across Tabs and Windows
- Summarizing the Cost of Iframes
- 14. Simplifying CSS Selectors
- Types of Selectors
- ID Selectors
- Class Selectors
- Type Selectors
- Adjacent Sibling Selectors
- Child Selectors
- Descendant Selectors
- Universal Selectors
- Attribute Selectors
- Pseudo-Classes and Pseudo-Elements
- The Key to Efficient CSS Selectors
- Rightmost First
- Writing Efficient CSS Selectors
- CSS Selector Performance
- Complex Selectors Impact Performance (Sometimes)
- CSS Selectors to Avoid
- Reflow Time
- Measuring CSS Selectors in the Real World
- Appendix: Performance Tools
- Index
书名：更快速网站（影印版）
作者：Steve Souders 著
国内出版社：东南大学出版社
出版时间：2009年12月
页数：231
书号：978-7-5641-1934-8
原版书出版商：O'Reilly Media
The animal on the cover of Even Faster Web Sites is a blackbuck antelope (Antilope
cervicapra), an endangered species found mainly in India, also known as the Indian
antelope. The V-shaped horns of the male blackbuck are ringed with several spiral
twists and can be as long as 28 inches. The male’s upper body is black or dark brown,
and its belly and the rings around its eyes are white. The female is light brown and does
not normally have a horn. Blackbucks roam the plains in herds of 15 to 20, feeding on
grasses, flowers, and fruits. On the open plain, the blackbuck is one of the fastest animals
on earth, able to reach speeds of 45 mph and outrun most predators over long
distances.
From the 18th through the early 20th centuries, the blackbuck antelope was the most
hunted wild animal in India. In 1932, several species of Indian deer and antelope, including
the blackbuck, were introduced to Texas for hunting and breeding. Today,
these species live on private hunting ranches and roam the surrounding hill country.
They are so plentiful—having multiplied to 19,000 throughout the state—that many
have been shipped to India to repopulate the native habitat.
Now protected in India by the Wildlife Protection Act of 1972, the blackbuck population
is steady at 50,000 native animals, plus 43,000 descended from Texas and other
populations. Although poaching is still a problem and humans have encroached on its
land, its protected status gained attention in 2006 when Indian film star Salman Khan
was sentenced to five years in jail for killing two blackbucks. According to Hindu
mythology, the blackbuck is considered to be the vehicle of the moon god, Chandrama,
and is believed to bestow prosperity wherever it lives.
cervicapra), an endangered species found mainly in India, also known as the Indian
antelope. The V-shaped horns of the male blackbuck are ringed with several spiral
twists and can be as long as 28 inches. The male’s upper body is black or dark brown,
and its belly and the rings around its eyes are white. The female is light brown and does
not normally have a horn. Blackbucks roam the plains in herds of 15 to 20, feeding on
grasses, flowers, and fruits. On the open plain, the blackbuck is one of the fastest animals
on earth, able to reach speeds of 45 mph and outrun most predators over long
distances.
From the 18th through the early 20th centuries, the blackbuck antelope was the most
hunted wild animal in India. In 1932, several species of Indian deer and antelope, including
the blackbuck, were introduced to Texas for hunting and breeding. Today,
these species live on private hunting ranches and roam the surrounding hill country.
They are so plentiful—having multiplied to 19,000 throughout the state—that many
have been shipped to India to repopulate the native habitat.
Now protected in India by the Wildlife Protection Act of 1972, the blackbuck population
is steady at 50,000 native animals, plus 43,000 descended from Texas and other
populations. Although poaching is still a problem and humans have encroached on its
land, its protected status gained attention in 2006 when Indian film star Salman Khan
was sentenced to five years in jail for killing two blackbucks. According to Hindu
mythology, the blackbuck is considered to be the vehicle of the moon god, Chandrama,
and is believed to bestow prosperity wherever it lives.
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