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YSlow 0.9 Release - Better Support for Web 2.0 (Yahoo! Developer Network blog)

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YSlow 0.9 Release - Better Support for Web 2.0

December 5, 2007

We're excited to announce the release of YSlow 0.9, Yahoo!'s web page performance analysis tool. There are two big features in this release. By integrating more tightly with Firebug's Net Panel, YSlow now finds non-DOM components such as Ajax requests and image beacons. And YSlow now crawls frames and iframes and analyzes those resources as well. There are several other new features and bug fixes described in the release notes including highlighting 404s, better detection of CSS expressions and JavaScript minification, and searching within the YSlow panel.

These features make YSlow stronger at identifying performance improvements for Web 2.0 applications. It's great that YSlow does even better performance analysis of pages, but be forewarned that your previous YSlow scores will drop if these new-found components exhibit bad performance characteristics. As mentioned in Rule 14 - Make Ajax Cacheable, some of the performance improvements that are readily applied to static content (far future Expires header, gzip compression, minification) can also be applied to Ajax responses. Whether it's Web 1.0 or Web 2.0, YSlow 0.9 helps you figure out what to fix to make your pages faster for your users.

Steve Souders
Stoyan Stefanov

Posted at December 5, 2007 8:19 AM

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Comments

This is very essential to the site enhancements and so on.

Posted by: selva at December 5, 2007 10:30 PM

Adding the ability to crawl frames and iframes is a very welcome addition.

Sadly it seems that YSlow crashes out Firefox when interrogating an iframe/AJAX heavy application which heavily utilises the YUI libraries

Posted by: Carl at December 6, 2007 1:29 AM

Hey Carl, could you send your URL/bug report using the feedback form:
http://developer.yahoo.com/yslow/feedback.html
Or discuss in the mailing list
http://tech.groups.yahoo.com/group/exceptional-performance/

Thanks,
Stoyan

Posted by: Stoyan at December 10, 2007 10:35 AM

Hrmm, last version, if I had "Patch Net Panel with YSlow", I would see all the JS files being downloaded across the wire. Now that I have upgraded, I do not see any JS files being transferred over the wire; if I uncheck it, the JS files show up.

I have caching disabled.

Other than that, I am totally diggin' the new features! Good job!

Posted by: MezZzeR at December 10, 2007 3:31 PM

Great plugin! YSlow (and Firebug) are essential tools for anyone doing (java) webdevelopment.

Keep up the great work!

Wim
http://javablog.be

Posted by: Wim Bervoets at December 14, 2007 12:56 AM

Steve and Stoyan,

Congrats on your success with YSlow 0.9!

Here's my take on Health 2.0.

Health 2.0 is derived from the term Web 2.0, which implies a 2nd generation/release of the Internet.

The '2.0' part was established within computer programming - as a new edition of a an application is released, it is common practice for the programmers to add an incrementing number at the end of a program's name, to label the new version.
Web 2.0 implies the '2nd release' of the Internet, which of course is not based on anything concrete. The Internet being made up of millions upon millions of interconnecting computers running lots of various programs, but is more of a concept to describe the type of programs/applications/functionality one can now locate on the Internet.

The Internet was initially complied of mainly static pages of data. Soon to follow was email, web forums and chat rooms where discussions could take place. Web 2.0 refers to a trend on the Internet that saw a step forward in the way users conduct communication over the Internet, which includes the use of blogs, videos, podcasts, wikis and online communities where people with common interests get together to share ideas, media, code and all types of information.

Web 2.0 technologies such as social networking, blogs, patient communities and online tools for search and self-care management look as though they will permanently alter the healthcare landscape indefinitely.

As with Web 2.0, there is a lot of debate about the meaning of the term 'health 2.0'. The Wall Street Journal recently attempted to define Health 2.0 as:

“The social-networking revolution is coming to health care, at the same time that new Internet technologies and software programs are making it easier than ever for consumers to find timely, personalized health information online. Patients who once connected mainly through email discussion groups and chat rooms are building more sophisticated virtual communities that enable them to share information about treatment and coping and build a personal network of friends. At the same time, traditional Web sites that once offered cumbersome pages of static data are developing blogs, podcasts, and customized search engines to deliver the most relevant and timely information on health topics.”

While this traditional view of the definition imputes it as the merging of the Web 2.0 phenomenon within healthcare. I personally believe it’s so much more. In my opinion, Health 2.0 goes way beyond just the permeant social networking technology to include a complete renaissance in the way that Healthcare is actually delivered and conveyed.

Source - http://rxpop.com/

Posted by: William Hill at January 11, 2008 1:02 PM

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