<pedrocorreia.net ⁄>
 

<Efficient JavaScript ⁄ >




clicks: 3249 3249 2006-11-06 2006-11-06 goto tecnologia myNews tecnologia  Bookmark This Bookmark This


Traditionally, a Web page would not contain much scripting, or at least, not much that would affect the performance of that Web page. However, as Web pages become more like applications, the performance of scripts is having a bigger effect. With more and more applications being developed using Web technologies, improving the performance of scripts is becoming increasingly important.

With a desktop application, a compiler is normally used to convert the source into the final binary. The compiler can take its time, and optimize as much as possible for good performance of the final application. Web applications do not have that luxury. Since they need to run on multiple browsers, platforms, and architectures, they cannot be completely precompiled. The browser has to do the interpretation and compilation each time it retrieves a script, and yet the final application has to run as smoothly as a desktop application, and load quickly as well. It is expected to run on a large variety of devices, from an ordinary desktop computer, to a mobile phone.

Browsers are fairly good at achieving this, and Opera has one of the fastest scripting engines of any current browser. However, browsers do have their limits, and that is where the Web developer has to take over. Ensuring that a Web application runs as fast as possible can be a simple matter of trading one type of loop for another, making one combined style change instead of three, or adding only the script that will actually be used.

This article will show several simple changes that can be made to improve the performance of your Web applications. Areas covered will be ECMAScript - the core language used by JavaScript, DOM, and document loading.



este é só um excerto do artigo, para aceder ao artigo completo, clique no link em baixo:
this is just a small excerpt from the article, to access the full article please click in the link below:

http://dev.opera.com/articles/view/48/




Subscribe News RSS  Subscribe News Updates by E-mail





myNews <myNews show="rand" cat="tecnologia" ⁄>

MongoDb Architecture new ...

NOSQL has become a very heated topic for large web-scale deployment where scalability and semi-struc (...)

clicks: 17899 17899 2012-05-14 2012-05-14 goto url (new window) horicky.blogspo... goto myNews tecnologia


A Hopefully Fair and Useful Comparison of Haskell Web Frameworks new ...

Recently there has been a lot of discussion and questions about the differences between the big thre (...)

clicks: 14445 14445 2012-05-13 2012-05-13 goto url (new window) softwaresimply.... goto myNews tecnologia


Retina graphics for your website new ...

retina.js is an open source script that makes it easy to serve high-resolution images to devices wit (...)

clicks: 14281 14281 2012-05-11 2012-05-11 goto url (new window) retinajs.com/ goto myNews tecnologia


What every programmer should know about memory, Part 1 new ...

In the early days computers were much simpler. The various components of a system, such as the CPU, (...)

clicks: 15634 15634 2012-05-10 2012-05-10 goto url (new window) lwn.net/Article... goto myNews tecnologia


The State Of HTML5 Video

HTML5 has entered the online video market, which is both exciting and challenging for developers in (...)

clicks: 6196 6196 2012-02-14 2012-02-14 goto url (new window) longtailvideo.c... goto myNews tecnologia


A Tour of Amazon's DynamoDB

Amazon's recent release of DynamoDB, a database whose name is inspired by Dynamo, the key-value data (...)

clicks: 5893 5893 2012-02-13 2012-02-13 goto url (new window) paperplanes.de/... goto myNews tecnologia


Google BigQuery Service: Big data analytics at Google speed

Rapidly crunching terabytes of big data can lead to better business decisions, but this has traditio (...)

clicks: 5544 5544 2011-11-30 2011-11-30 goto url (new window) googlecode.blog... goto myNews tecnologia


Video: CSS3 Secrets: 10 things you might not know about CSS3

A number of prominent front-end developers delivered helpful talks at this year's Fronteers 2011 con (...)

clicks: 6438 6438 2011-11-30 2011-11-30 goto url (new window) css.dzone.com/a... goto myNews tecnologia