First, I triedSunSpider. To my total amazement, IE9 actually bested Chrome on the SunSpider benchmark.
Next, I tried Google’s V8 Benchmark Suite. On this suite, I saw the results I have typically seen before. Chrome posted these results:
So on V8, Chrome destroys IE9, but on SunSpider, IE9 eeks out a slight lead. I could go in to endless speculation about benchmark optimization and validity, but real world results are what matter. So I’ll give IE9 a fair try as my primary browser for a week and see what happens.