I've tried porting some AI and physics from AS3 over to JS and realized that there are some fundamental problems with JS that simply isn't on the roadmap to fix

I've tried porting some AI and physics from AS3 over to JS and realized that there are some fundamental problems with JS that simply isn't on the roadmap to fix. Overall "engine-like" code performance can be 2x-5x slower in JS then in a language that supports basic typing. I found it very telling that Unity3D announced compiling for Flash 11 and nothing about WebGL.