Microsoft has released the Internet Explorer 9 Platform Preview 2, keeping to its promise of delivering new IE9 functionality every eight weeks. The new release features enhanced performance and improved Acid3 test results.
Microsoft has released the Internet Explorer 9 Platform Preview
2, keeping to its promise of delivering new IE9 functionality every eight weeks.
Microsoft originally introduced the IE9 Platform Preview in
mid-March at the MIX 2010 show in Las Vegas, and just seven weeks later
the software giant has released version 2 of the IE9 Platform Preview,
which features advances in compliance to industry-standard tests,
improvements in performance and a lot more. Internet Explorer 9
Platform Preview 2 is available for developer download at the IE Test
Drive site: www.ietestdrive.com.
Moreover, according to a source close to the company, there have
been more than 1 million downloads of the IE9 Platform Preview to date
Among the goals of IE9 is to deliver HTML5 capability into the
browser as well as the "same markup" experience to developers -- which
basically means developers will be able to write code once and have it
run on multiple sites without modification. Essentially this means
enabling the same markup - the same HTML, the same CSS and the same
script - to work the same across different browsers is as crucial as
performance for HTML5's success. Developers should expect the
same markup to produce the same results across browsers
Microsoft has created a rhythm of disclosure around IE9. At the
company's Professional Developers Conference in November 2009,
Microsoft discussed performance, hardware acceleration and same markup.
At MIX 2010 the company discussed performance, hardware
acceleration and same markup. And on May 5 Microsoft is back with
improvements to its IE9 preview for developers.
Among the improvements is that Microsoft's IE9 preview has passed
more of the Acid3 test. Microsoft has taken heat for its Acid3 results,
but it is still early in the IE9 development process and the company is
showing improvement. Acid3 comes from the Web Standards Project and
checks how well a browser adheres to certain selected elements from web
With IE9 Platform Preview 2, Microsoft increased its Acid3 test score
results from 55 in the initial platform preview to 68 -- out of 100 --
in the new release.
To be sure, the new release builds on the initial platform preview .
And in addition to more improvements to IE9's performance and support
for standards , with this release Microsoft has submitted additional
tests to the working groups at the World Wide Web Consortium
(W3C). Indeed, Microsoft submitted 79 new tests to the W3C, bring the
number of tests the company has submitted to 183, a company
spokesperson said. Microsoft has been busy creating, submitting, and
revising comprehensive test cases for developers and browser
manufactures to responsibly test and design for same markup.
Meanwhile, according to Webkit.org's SunSpider benchmark test,
Internet Explorer 9 Platform Preview 2 is now even faster. The overall
performance results have improved by 117 milliseconds.
In addition, more than 10 new developer samples on the IE9 Test
Drive site highlight performance, graphics and HTML5 . Developers can
take a look at these samples in a video at http://vimeo.com/11370608
, or view demonstrations of the concept of same markup in action at http://vimeo.com/11478301
, and http://vimeo.com/11479609
. Should a password be required, use "samemarkup," however the videos will be live on Microsoft's Channel 9 by mid-day May 5.
Microsoft also changed the platform preview console window to be a
full tab that includes diagnostic information from IE. The
company also added a "Change User Agent String" tool that enables you
to change the UA string sent with every request, selecting from preset
strings or creating your own custom string. This complements
another feature Microsoft added - the IE9 UA string.
Said a company spokesperson: "We know that when developers spend
less time re-writing their sites to work across browsers they have more
time to create amazing experiences on the web. At its essence,
that is what we are trying to achieve when we say 'same markup.'
It's allowing for an interoperable web so developers can create the
next class of rich web apps that will take advantage of the
capabilities that will be made available with HTML5."