High Performance Web Sites: Essential Knowledge for Front-End Engineers Review
Posted by
Pearlene McKinley
on 8/02/2012
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Labels:
ajax,
css,
javascript,
optimization,
performance,
software,
speed,
web development,
webdev,
yahoo
Average Reviews:
(More customer reviews)§
_High Performance Web Sites_ is one of those books that will get read by more people than buy it because it is both a fast read and organized into clearly differentiated subjects. This makes it easy to pick up for a moment or pass along to team members with different specialties.
Each of these "14 Steps to Faster-Loading Web Sites" (listed in the editorial review above) is itself divided into related tips with practical pointers. The fact that the book is full of these pointers is not the only value I extracted. We also get something a bit more subtle. The fact that the author is a performance expert at one of the mega-companies that define the Web for most of us lends authority to the book. It is easy to have confidence that his practical experience will have immediate lessons for teams with the same problems, if on a smaller scale.
Steve Souders provides a special addition to his tips: his example pages offer direct comparisons and means to make our own tests. This is something rarely encountered in such books. The book ends with a 30-page chapter where he deconstructs 10 of the top Web sites in the U.S. using the rules and tools described in the book.
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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
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