Hjem

Credits;Preface; How This Book Is Organized; Conventions Used in This Book; Comments and Questions; Using Code Examples; Safari® Books Online; Acknowledgments;
Chapter 1: Understanding Ajax Performance;
1.1 Trade-offs;
1.2 Principles of Optimization;
1.3 Ajax;
1.4 Browser;
1.5 Wow!;
1.6 JavaScript;
1.7 Summary;
Chapter 2: Creating Responsive Web Applications;
2.1 What Is Fast Enough?;
2.2 Measuring Latency;
2.3 Threading;
2.4 Ensuring Responsiveness;
2.5 Summary;
Chapter 3: Splitting the Initial Payload;
3.1 Kitchen Sink;
3.2 Savings from Splitting;
3.3 Finding the Split;
3.4 Undefined Symbols and Race Conditions;
3.5 Case Study: Google Calendar;
Chapter 4: Loading Scripts Without Blocking;
4.1 Scripts Block;
4.2 Making Scripts Play Nice;
4.3 Browser Busy Indicators;
4.4 Ensuring (or Avoiding) Ordered Execution;
4.5 Summarizing the Results;
4.6 And the Winner Is;
Chapter 5: Coupling Asynchronous Scripts;
5.1 Code Example: menu.js;
5.2 Race Conditions;
5.3 Preserving Order Asynchronously;
5.4 Multiple External Scripts;
5.5 General Solution;
5.6 Asynchronicity in the Real World;
Chapter 6: Positioning Inline Scripts;
6.1 Inline Scripts Block;
6.2 Preserving CSS and JavaScript Order;
6.3 Danger: Stylesheet Followed by Inline Script;
Chapter 7: Writing Efficient JavaScript;
7.1 Managing Scope;
7.2 Efficient Data Access;
7.3 Flow Control;
7.4 String Optimization;
7.5 Avoid Long-Running Scripts;
7.6 Summary;
Chapter 8: Scaling with Comet;
8.1 How Comet Works;
8.2 Transport Techniques;
8.3 Cross-Domain;
8.4 Effects of Implementation on Applications;
8.5 Summary;
Chapter 9: Going Beyond Gzipping;
9.1 Why Does This Matter?;
9.2 What Causes This?;
9.3 How to Help These Users?;
Chapter 10: Optimizing Images;
10.1 Two Steps to Simplify Image Optimization;
10.2 Image Formats;
10.3 Automated Lossless Image Optimization;
10.4 Alpha Transparency: Avoid AlphaImageLoader;
10.5 Optimizing Sprites;
10.6 Other Image Optimizations;
10.7 Summary;
Chapter 11: Sharding Dominant Domains;
11.1 Critical Path;
11.2 Who's Sharding?;
11.3 Downgrading to HTTP/1.0;
11.4 Rolling Out Sharding;
Chapter 12: Flushing the Document Early;
12.1 Flush the Head;
12.2 Output Buffering;
12.3 Chunked Encoding;
12.4 Flushing and Gzip;
12.5 Other Intermediaries;
12.6 Domain Blocking During Flushing;
12.7 Browsers: The Last Hurdle;
12.8 Flushing Beyond PHP;
12.9 The Flush Checklist;
Chapter 13: Using Iframes Sparingly;
13.1 The Most Expensive DOM Element;
13.2 Iframes Block Onload;
13.3 Parallel Downloads with Iframes;
13.4 Connections per Hostname;
13.5 Summarizing the Cost of Iframes;
Chapter 14: Simplifying CSS Selectors;
14.1 Types of Selectors;
14.2 The Key to Efficient CSS Selectors;
14.3 CSS Selector Performance;
14.4 Measuring CSS Selectors in the Real World;Performance Tools; Packet Sniffers; Web Development Tools; Performance Analyzers; Miscellaneous;Colophon;