It all depends on your workload.

I'm working on a web app that uses typed arrays heavily.

Chrome runs my test case in 2.7 seconds, Firefox in 3.2, and IE Edge in 23 seconds... (ie 11 in 30+)

Now to be fair i developed "for" firefox, checking that it worked in IE and chrome the whole way, but that is a pretty large performance difference.

Plus i've always hated benchmarks. They are so easy to "game" without real improvements in actual code. They are great for development and regression testing, but when used to compare engines i've found they are nearly useless.

All that being said, I applaud the IE team for really sticking to their promise of improving the browser and it seems they are going to give Chrome and FF a run for their money soon.