MS posted this graph on their site:
http://ie.microsoft.com/testdrive/benchmarks/sunspider/
yet the IE10 results are in stark contrast to Tom’s Hardware’s findings:
http://www.tomshardware.com/reviews/web-browser-chrome-25-firefox-19,3459-6.html
which are more indicative of the actual experience, and general poor performance of IE10 and development with Javascript.