According to company spokesperson Steven Sinofsky, IE9 is almost on par with Firefox and Chrome - despite having been in development for only a few weeks.
"We know we have a lot of work to do in some areas of performance," said Sinofsky, who was quoted by Gregg Keizer of Computerworld. "[However], on SunSpider, we're on par with IE9 [and] getting very close to the other browsers."
Indeed, previous Computerworld SunSpider benchmarks measured Google's Chrome as 10 times faster than IE8, while Mozilla's Firefox outperformed the veteran browser by nearly four times.
"When any browser improves, the Web improves," Dotzler wrote in an official blog post. "It looks to me like Microsoft is getting more serious about improving the Web. This is good news and the IE team should be hearing our positive feedback and encouragement."