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High Performance JavaScript (Inglese) Copertina flessibile – 13 apr 2010

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4,2 su 5 stelle 33 recensioni clienti su Amazon.com

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Descrizione del libro

Build Faster Web Application Interfaces

L'autore

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/

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Amazon.com: 4.2 su 5 stelle 33 recensioni
35 di 35 persone hanno trovato utile la seguente recensione
4.0 su 5 stelle Good tips, concise, not really ground-breaking 3 aprile 2010
Di Miller Medeiros - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
This book is a good reference on how to optimize JavaScript applications and also an interesting read in case you want to know how things work "under the hood".

Many of the techniques presented also works for other programming languages (and are well-known performance tricks) and can be used without increasing too much the code complexity, which is a huge gain, you're not just becoming a better JavaScript developer but also a better developer.

One thing that should be clear is that this book is NOT intended for BEGINNERS, since it already presumes that you have a good knowledge and experience with JS programming.

If you already read Professional JavaScript for Web Developers (Wrox Programmer to Programmer) (also written by Zakas), High Performance Web Sites: Essential Knowledge for Front-End Engineers and Even Faster Web Sites: Performance Best Practices for Web Developers you will find that some of the techniques were already present on those books, so if you're up-to-date with the new technologies/tools and been researching about the subject probably you already know a good part of what this book has to teach, nevertheless it still a nice and interesting read since it explains how the JavaScript engines work and why those techniques are faster, the fact that it is concise is a big plus too.

The book has some typo mistakes (which doesn't affect the understanding) and some of the line graphs (used to show browsers benchmark) are hard to read since all the lines look the same (as of 1st Edition).

I strongly recommend this book to any intermediate to advanced developer who wants to learn how to improve the overall performance of JavaScript applications since it is a concise and accurate compilation of best practices, even if you know a lot about the subject you may learn a few new tricks or understand a little bit better why it works...
11 di 12 persone hanno trovato utile la seguente recensione
2.0 su 5 stelle Good tips - but outdated in a rapidly-changing environment 24 maggio 2015
Di Todd - Pubblicato su Amazon.com
Formato: Formato Kindle Acquisto verificato
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.
4.0 su 5 stelle Excellent book for optimizing code, not just JavaScript 21 giugno 2012
Di BBP - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
For anyone concerned with optimizing JavaScript performance, this is the book for you. Nothing in here should be a surprise for an experienced and good developer and some of the techniques you already know, but it's a valuable collection to have at your fingertips. The topics are neither academic/theoretical nor obscure. They are practical, imminently usable, and immediately applicable. I'm the lead developer for a fashion retailer and bought this book in order to learn more about how to make the site faster, especially because we have a lot of third party scripts. From the get-go, the author just dives in and I learned about blocking scripts and techniques on how to stack code to minimize page render time.

This is a mercifully thin book, but densely packed with information and techniques. Be warned however, that this is not for JavaScript newbies. You should have advanced coding experience and know about the DOM and DOM scripting. Many of the techniques the author teaches you will also apply to any programming language: things like minimizing loops, putting the most likely condition first in an if/else block, avoiding accidental infinite loops, memoization (a new technique to me). Some parts are highly technical and he lost me for a bit on the discussion of the scope chain, but the rest of the book is concise and clear. He discusses methods that are inherently slow and gives comparisons on alternative methods, with charts to show the computational costs and savings. I do wish that they were in color, though, because one shade of grey can be difficult to distinguish from another shade of grey.

Highly recommended. The only thing I would've liked to see is a discussion on jQuery techniques because I rarely code in pure JavaScript anymore and rely heavily on jQuery and sites are increasingly dependent on this framework.
5.0 su 5 stelle Great book 30 novembre 2011
Di Joel - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
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.
3 di 3 persone hanno trovato utile la seguente recensione
4.0 su 5 stelle A solid addition to a JS developer's bookshelf 8 aprile 2010
Di Eitan Konigsburg - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
Zakas does a brilliant job covering all the bases for the modern Javascript developer. Optimizing Javascript performance is often difficult, if done at all, and now there are a lot of good tips conveniently in one reference. The topics are well thought out and organized in a natural way. And while the lines on the charts were a bit difficult to distinguish from one another, I liked how the various techniques were backed up with cross-browser analysis.

I would highly recommend this book to the intermediate JS developer. For those of us who follow front-end optimization discussions regularly, some of the topics covered in this book have been covered elsewhere. Nevertheless, there is still a lot useful material here.

Front-end performance is currently a hot topic and I'm glad Zakas et. al. are nudging developers in the right direction.