High Performance JavaScript: Build Faster Web Application Interfaces: Zakas, Nicholas C.: 9780596802790: Amazon.com: Books

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If you're like most developers, you rely heavily on JavaScript to build interactive and quick-responding web applications. The problem is that all of those lines of JavaScript code can slow down your apps. This book reveals techniques and strategies to help you eliminate performance bottlenecks during development. You'll learn how to improve execution time, downloading, interaction with the DOM, page life cycle, and more.

Yahoo! frontend engineer Nicholas C. Zakas and five other JavaScript experts—Ross Harmes, Julien Lecomte, Steven Levithan, Stoyan Stefanov, and Matt Sweeney—demonstrate optimal ways to load code onto a page, and offer programming tips to help your JavaScript run as efficiently and quickly as possible. You'll learn the best practices to build and deploy your files to a production environment, and tools that can help you find problems once your site goes live.

Identify problem code and use faster alternatives to accomplish the same task
Improve scripts by learning how JavaScript stores and accesses data
Implement JavaScript code so that it doesn't slow down interaction with the DOM
Use optimization techniques to improve runtime performance
Learn ways to ensure the UI is responsive at all times
Achieve faster client-server communication
Use a build system to minify files, and HTTP compression to deliver them to the browser

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Editorial Reviews

About the Author

Nicholas C. Zakas is a Web Software Engineer who specializes in user interface design and implementation for Web applications using JavaScript, Dynamic HTML, CSS, XML, and XSLT. He is currently principal front end engineer for the Yahoo! homepage and is a contributor to the Yahoo! User Interface (YUI) library, having written the Cookie Utility, Profiler, and YUI Test.

Nicholas is the author of Professional JavaScript for Web Developers and a co-author on Professional Ajax, and has contributed to other books. He has also written several online articles for WebReference, Sitepoint, and the YUI Blog.

Nicholas regularly gives talks about Web development, JavaScript, and best practices. He has given talks at companies such as Yahoo!, LinkedIn, Google, and NASA, and conferences such as the Ajax Experience, the Rich Web Experience, and Velocity.

Through his writing and speaking, Nicholas seeks to teach others the valuable lessons he's learned while working on some of the most popular and demanding Web applications in the world.

For more information on Nicholas: http://www.nczonline.net/about/

Product details

Publisher ‏ : ‎ O'Reilly Media
Publication date ‏ : ‎ April 13, 2010
Edition ‏ : ‎ First Edition
Language ‏ : ‎ English
Print length ‏ : ‎ 232 pages
ISBN-10 ‏ : ‎ 059680279X
ISBN-13 ‏ : ‎ 978-0596802790
Item Weight ‏ : ‎ 13.6 ounces
Dimensions ‏ : ‎ 7 x 0.6 x 9.19 inches
Best Sellers Rank: #2,523,232 in Books (See Top 100 in Books)
- #308 in JavaScript Programming (Books)
- #3,464 in Computer Programming Languages
- #4,082 in Programming Languages (Books)
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82 ratings

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Nicholas C. Zakas

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Nicholas C. Zakas is a front-end consultant who specializes in user interface design and implementation for web applications using JavaScript, Dynamic HTML, CSS, XML, and XSLT. Has has 15 years of web development experience and spent nearly five years at Yahoo! in various roles, including principal front end engineer for the Yahoo! homepage and contributor to the Yahoo! User Interface (YUI) library, having written the Cookie Utility, Profiler, and YUI Test.

Nicholas is the author of Professional JavaScript for Web Developers and High Performance JavaScript, a co-author on Professional Ajax, and a contributor to Even Faster Web Sites. He has also written for several online sites such as WebReference, Sitepoint, the YUI Blog, A List Apart, and the Web Performance Advent Calendar.

Nicholas regularly gives talks about web development, JavaScript, and best practices. He has given talks at companies such as Yahoo!, LinkedIn, Google, Netflix, TripAdvisor, and NASA, and conferences such as the Ajax Experience, the Rich Web Experience, OSCON, WebDirections, Fronteers, and Velocity.

Through his writing and speaking, Nicholas seeks to teach others the valuable lessons he’s learned while working on some of the most popular and demanding web applications in the world. He firmly believes that no difficult problem should need to be solved more than once.

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Joel
Great book
Reviewed in the United States on November 30, 2011
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There are things covered in this book that I haven't seen elsewhere but I have often wondered about. Highlights were string processing optimization, techniques in adding non-blocking scripts, and in-depth look at array processing.. I also really enjoyed detailed look at different ways to implement a javascript String trim() method - made me realise again how bad the advice a google search can return sometimes. The most disappointing was Ch9. It's rather confusing and wordy. I didn't think it did a great job of explaining how to package up scripts into one file - it probably needs a few more chapters to explain it better and the author may have been struggling to squash it all in there.
Having said that. LOVED how small the book was - it was very refreshing and I got through it in less than a week. If you already have Nicolas other book Professional JavaScript and you're wondering whether to get this book - I would recommend you do. There is more than enough variation and new content and the chapters by other authors are a real bonus.

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R. Friesel Jr.
great round-up of JS best practices (2 reviews in 1)
Reviewed in the United States on April 14, 2010
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While reading Nicholas Zakas' "High Performance JavaScript", it occurred to me that there were actually two different reviews that I wanted to write. So, rather than try to reconcile them into one review, I'll simply apply them here as an ordered list.

(1) To continue with the JavaScript University metaphor (from my review of Zakas' Professional JavaScript for Web Developers (Wrox Programmer to Programmer)): Finals are coming up in Prof. Crockford's upper-division JavaScript class. You've been a diligent student all semester and although you're not failing, it always seems like you're somewhere in the middle of the pack. You want desperately to ace the final exam, so you reach out for some help. Zakas (the graduate student/teaching assistant for the class) offers to show you the thesis he is working on. Then It hits you like a bolt from the blue -- every bit of it resonates with you. "It's so simple! so clear!" you exclaim. The inner machinations of the language snap together in a way that makes it all feel new and exciting -- the possibilities are boundless! You go back over your notes. You were close -- oh so close -- the whole time. But the last little bits drop in. A refinement here, a re-factor there... and the next thing you know, things are blazing. Your pages load 60% faster, execution time is down an average of 40%. You're amazed at yourself. And when the grades for the final exam come back, you're pleased to see that you aced it (aside from that little Oops on scoping closures -- but you try to think of that as a conscious trade-off). Prof. Crockford is pleased (if a little disappointed that it took you this long to Get It) and you're the envy of your peers. At least until next semester's RegEx class with Prof. Levithan. [Rated: 5 of 5]

(2) The frustrating part about working at a well-organized shop is that you get yourself all excited for a book like this and then half the recommendations in there are things that you're already doing. Put scripts at the bottom of the document? Check. Minify and compress? Check. Concatenate and package? Check. So on the one hand you say: "I guess I can sleep a little easier at night knowing that our build system adheres to the best practices recommended by the experts out there." But on the other hand, you're a little disappointed because you were hoping for some startling revelations. Again: not that this makes it without merit. From this perspective, what is noteworthy about this book is that these best practices and techniques are all gathered up in one place and presented in a logical order; even if "you're already doing it right", it is still a worthwhile exercise to meditate on the specifics, and to really go deep on why these best practices are important. (Plus, it's great to see the data -- nothing beats a little chartporn for proving the point.) [Rated: 4 of 5]

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Adam Rackis
I can honestly say it's one of the best I've ever read
Reviewed in the United States on February 24, 2015
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I just realized I hadn't yet reviewed this book. I can honestly say it's one of the best I've ever read, and I've read many.

Beware though, this is not at all an introductory book. If you're new to JS, read some other material first, to build up to this.

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John Asperin
Very informative
Reviewed in the United States on March 7, 2011
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I am liking this book. I learned a lot and have been using the techniques indicated in the book. The websites that I make have a lot of JavaScript codes and these techniques improved the performance. Thanks to Nicholas Zakas for a great book!

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Eliecer Alejandro Molina
Great book. Old but still relevant
Reviewed in the United States on July 30, 2023
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Great book. It's kinda old but still relevant. Some concepts and explanations are obvious but it's nice to have. The performance tricks are ok but would be good an clarification about the "why's"

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Moti
Nice book
Reviewed in the United States on August 16, 2015
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Slightly outdated

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Chris
good info for large scale websites and applications
Reviewed in the United States on October 26, 2012
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Although optimizing your javascript code generally only saves a few ms here and there, on larger scale websites and web applications you can notice a difference. I think this book covered a lot of important information especially with data/object handling.

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Todd
Good tips - but outdated in a rapidly-changing environment
Reviewed in the United States on May 24, 2015
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Working at a mobile advertising startup, I've been looking for new ways to make our code as high-performing as possible. So, naturally, I came to this book.

After reading it, there are perhaps four tips from the entire book that are relevant to developers today. The rest are based off micro-benchmarks of browsers like IE 6 and Firefox 4 - needless to say, how browsers handle JS has changed a lot since then, so these benchmarks are useless.

In conclusion: if you absolutely /need/ to write the absolute fastest JS possible, this book might be worth a quick skim and should not be taken too seriously. If you aren't concerned about shaving off a couple of ms from your code, you can find much of this advice for free, online, with up-to-date benchmarks and comparisons.

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Desproposito
Muy Desactualizado
Reviewed in Spain on March 25, 2021
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Es muy antiguo, no me dí cuenta al comprarlo pero no entiendo por qué venden libros de este tipo sin ediciones actualizadas, no lo veo muy ético.

Hay ciertas cosas que se pueden aprovechar, pero en general terminas desconfiando de todo lo que se indica porque está basado en versiones antiguas de javascript y navegadores.

No sería malo, aunque tampoco maravilloso, si estuviese actualizado.

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Suresh Pattu
Five Stars
Reviewed in India on September 6, 2016
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Delivery time and package everything is perfect :)

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Client d'Amazon
Strong content
Reviewed in France on December 6, 2020
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This book is (imo) for medium to advanced devs or, at least targets people who are looking for precises and strong advises in JS perfs. The metrics are old what is written in the book is still up to date.
I needed to refresh my knowledges and to be able to explain to optimizations.
Nice book with concrete example

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Cliente Amazon
Ótimo
Reviewed in Brazil on July 27, 2016
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Muito bom o livro, ótimo para quem já programa com javascript e quer melhorar o desempenho das suas app. Recomendo!

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いちご
JavaScriptの上級者を目指すには必読の一冊
Reviewed in Japan on April 16, 2011
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高速なJavaScriptプログラムを記述するための技法を様々な角度から解説しています。
大別すると、(1)アルゴリズムなどJavaScript内部の高速化 (2)DOMやAjax通信などJavaScript外部の高速化 (3)処理の非同期化によるレスポンス性向上に分けられます。

(1)の内部処理については初歩的なアルゴリズムから始まり、「if文とswitch文のどちらが速いか？」、「（JavaScriptに整数型は存在しないが）ビット演算による高速化」といった話題まで議論しています。
(2)のDOMなど外部へのアクセスの最小限化は、知識の有無で根本的な違いが出てきます。一方、（jQueryなどの）クロスブラウザはオーバーヘッドの分遅いので、Ajax処理を自前で書いた方がよい場合もあると締めています。
(3)の非同期化では、処理を細切れにすることで、数秒掛かるような処理であっても快適な操作性を提供できます。JavaScriptの柔軟性により他言語よりも簡潔に分割処理を記述できることが興味深く感じられました。

いずれの技法の説明においてもブラウザの内部処理について詳しく述べられていますので、単なる高速化に限らずJavaScript全般の知識を深められます。
本書は、フレームワークなどの低レベル処理を記述しようとしている方に限らず、JavaScriptについて一歩進んだ知識を得ようとする方全てにとって必読です。

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2.0 out of 5 stars Muy Desactualizado

5.0 out of 5 stars Five Stars

5.0 out of 5 stars Strong content

5.0 out of 5 stars Ótimo

5.0 out of 5 stars JavaScriptの上級者を目指すには必読の一冊

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JavaScriptの上級者を目指すには必読の一冊