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Significant Enhancement in Internet Explorer 9

 
Written by Wayne Ye  Friday, February 18, 2011

Background

Microsoft announced Internet Explorer 9 Release Candidate on  Feb 10th, 2011, RC indicates except bug fixing, there would not have big changes before the final RTM. Since I've been keeping a watchful eye on IE9 from its very first preview version, I would like to write a post about its significant enhancement from a developer's point of view, I intend to summarize most significant enhancement points of IE9 listed below:

  • Enhanced performance
    1. The New Chakra JavaScript Engine
    2. Hardware Acceleration
  • Enhanced Web Standard Support
    1. HTML5 (huge number of new attributes support and Web Storage support)
    2. CSS3 (border-radius, ::selection pseudo-element, )
    3. W3 standard Geolocaltion API
  • Windows 7 Integration
    1. Website customizable TaskBar Jumplist.

By achieving new features above, IE9 will absolutely be the fastest and best Web Standard support version in the entire IE history.  

Walk through IE9 Enhancements

New JavaScript Engine – Chakra

IE9 team must be persistently working so hard on improving Chakra's performance, I picked following two paragraph  from Chakra Page on Wikipedia:

Microsoft's development of the engine was in response to evolving competing browsers, on which IE8 was lagging behind in terms of JavaScript processing speed.[3] SunSpider tests performed on November 18, 2009 showed the PDC version of IE9 executing scripts much faster than IE8, but slower than respectively Firefox 3.6, Chrome 4, and WebKit Nightly.[4] The same test performed on March 15, 2010 showed the first IE9 Platform Preview (using the then-current version of Chakra) to be faster than Firefox (with SpiderMonkey), but slower than respectively Safari (with SquirrelFish Extreme), Chrome (with V8), and Opera (with Carakan)

On February 8, 2011, the test showed the IE9 Release Candidate (using the current version of Chakra) to be faster than Safari, Firefox (with TraceMonkey), Opera, and Chrome.


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