Product Description

Want your web site to display more quickly? This book presents 14 specific rules that will cut 25% to 50% off response time when users request a page. Author Steve Souders, in his job as Chief Performance Yahoo!, collected these best practices while optimizing some of the most-visited pages on the Web. Even sites that had already been highly optimized, such as Yahoo! Search and the Yahoo! Front Page, were able to benefit from these surprisingly simple performance guidelines. The rules in High Performance Web Sites explain how you can optimize the performance of the Ajax, CSS, JavaScript, Flash, and images that you've already built into your site -- adjustments that are critical for any rich web application. Other sources of information pay a lot of attention to tuning web servers, databases, and hardware, but the bulk of display time is taken up on the browser side and by the communication between server and browser. High Performance Web Sites covers every aspect of that process. Each performance rule is supported by specific examples, and code snippets are available on the book's companion web site. The rules include how to: Make Fewer HTTP Requests Use a Content Delivery Network Add an Expires Header Gzip Components Put Stylesheets at the Top Put Scripts at the Bottom Avoid CSS Expressions Make JavaScript and CSS External Reduce DNS Lookups Minify JavaScript Avoid Redirects Remove Duplicates Scripts Configure ETags Make Ajax Cacheable If you're building pages for high traffic destinations and want to optimize the experience of users visiting your site, this book is indispensable. "If everyone would implement just 20% of Steve's guidelines, the Web would be a dramatically better place.Between this book and Steve's YSlow extension, there's really no excuse for having a sluggish web site anymore." -Joe Hewitt, Developer of Firebug debugger and Mozilla's DOM Inspector "Steve Souders has done a fantastic job of distilling a massive, semi-arcane art down to a set of concise, actionable, pragmatic engineering steps that will change the world of web performance." -Eric Lawrence, Developer of the Fiddler Web Debugger, Microsoft Corporation

Product Details

About the Author
Steve works at Google on web performance and open source initiatives. His book High Performance Web Sites explains his best practices for performance along with the research and real-world results behind them. Steve is the creator of YSlow, the performance analysis extension to Firebug. He is also co-chair of Velocity 2008, the first web performance conference sponsored by O'Reilly. He frequently speaks at such conferences as OSCON, Rich Web Experience, Web 2.0 Expo, and The Ajax Experience.

Steve previously worked at Yahoo! as the Chief Performance Yahoo!, where he blogged about web performance on Yahoo! Developer Network . He was named a Yahoo! Superstar. Steve worked on many of the platforms and products within the company, including running the development team for My Yahoo!. Prior to Yahoo! Steve worked at several small to mid-sized startups including two companies he co-founded, Helix Systems and CoolSync. He also worked at General Magic, WhoWhere?, and Lycos.

In the early 80's Steve caught the Artificial Intelligence bug and worked at a few companies doing research on Machine Learning, including several publications and conference appearances. He received a BS in Systems Engineering from the University of Virginia and a MS in Management Science and Engineering from Stanford University .

Steve's interests are varied. He sits on the board of Freehand Systems and Fremont Hills Country Club . He teaches Sunday School at First Lutheran Church in Palo Alto. He's played basketball with several NBA and WNBA players. He was a member of the Universal Studios Internet Task Force. He participated in setting a Guinness world record. He rebuilt a 90-year-old carriage house. He has a wonderful wife and three daughters.

Customer Reviews

Great book on web site performance
So you're web site seems slow, users have to wait a long time for pages to render. Is it time to start looking at your database, and webserver configs? Perhaps not, there's a lot to be gained by following a few simple rules in your front end.

This is a well written, well edited book with only a few minor editing issues. That makes it the best of many I've read recently.

So what's in this book.

The first two chapters introduce the problem and give you some background information about HTTP requests and caching which are useful to understand the next 15 chapters.

This book goes through 14 different techniques to improve the amount of time from the first request to the the completion of the page being rendered. Thus improving the perceived responsiveness of the web site.

There's a useful explanation of the difference between HTTP 1.1 and 1.0 with regards to how browsers (IE and Firefox) will limit (based on the standards) the amount of parallel downloads from the server.

The chapters are in order of highest impact to improve performance to least.

Here's the Chapter list:
1. Make Fewer HTTP Requests
2. Use a Content Delivery Network
3. Add an Expires Header
4. Gzip Components
5. Put Stylesheets at the Top
6. Put Scripts at the Bottom
7. Avoid CSS Expressions
8. Make JavaScript and CSS External
9. Reduce DNS Lookups
10. Minify JavaScript
11. Avoid Redirects
12. Remove Duplicates Scripts
13. Configure ETags
14. Make Ajax Cacheable

In each chapter the author introduces the issue, explains the rule and solution, and then provides some example pages to demonstrate the effectiveness of each rule.

Nearly every chapter had an "aha" moment for me.

The author worked on the Yahoo properties analyzing and suggesting improvements. It will come as no surprise that in chapter 15, where he looks at the top 10 US sites and analyzes which rules are and aren't being followed for those sites that Yahoo comes out near the top.

If you work on websites, front end or back end, it would be worth your time to read this book. At only 137 pages of content, it won't eat a hugh amount of time, and I think you'll find that your info/time to read ratio will compare favorably to many many other books.

High Performance Web Sites
I remember when I first started using the Internet. Dial ups were extremely slow at the time, so I'd type in a URL, then go make a sandwich. By the time I came back, hopefully the page would be loaded.

Today, we expect more. Often if a page takes more than a few moments to load, I don't bother. I tend to equate professional with quick. If a site doesn't load quickly or if parts of the page are slow, I naturally assume that the information provided might be as shabbily compiled. I simply move onto a different page.

High Performance Web Sites looks at how we can make our own websites load more quickly. I was surprised at how many different little things that can be done beyond optimizing graphics. Most of these things only take a few little nips and tucks and none were beyond my novice level of ability.

Great Content, but not much unique in book-to-Web comparison
So this book is definitely a must-read for any front end folk. It shows how to make sites trim, slick and usable using some simple, sometimes common sense approaches that manage to elude the best of us before we read the book. Not only that, it provides a hierarchy of proven, scientific (maybe not in the traditional sense but certainly field-tested) hard evidence showing why the tricks are in the order they are.

This book and YSlow can definitely help make any site feel more responsive, and maybe shave dollars off bandwidth bills!