Mousemovement Performance improvement

Hello everyone, I am looking for an alternative/better performing MouseMovement method. I read the following in another entry:

https://github.com/CreateJS/EaselJS/issues/977 I do recommend writing your own hit testing if you don't need pixel perfect hit interactions though!

So I assume the problem is in the hitTest method, which analyzes pixel perfect everything. I still dared to modify the CreateJS lib. Does anyone here have experience and can help me how to adjust which method? Thank you!