Look who is coming back into the web browser game. Proving that competition is the best recipe towards improving one's product, Microsoft has tweaked IE's JavaScript engine in unexpected ways, just like Derick Eisenhardt is showing in his blog with the famous SunSpider benchmark.
While it's still a bit far from the competition, at least IE developers are doing something to address all the criticism directed to the aging Trident engine. Of course, benchmarks are one thing, and real world usage is another, and frankly with today webpages and webapps IE7 does not feel as slow as the numbers might make it look, but it's better prepared for future JS-heavy developments.
via
Asa Dotzler: Firefox and more