$.live performance and multi-container mousemove delegation?

$.live performance and multi-container mousemove delegation?


I may soon need to track mouse movements in various multiple
containers in a webapp. I was wondering if using $.live would be
impractical in this scenario since $.live binds to document and may
degrade performance if you need to track numerous mousemove events but
only inside a limited area.
would it not be much better to explicitly specify containers in this
case to prevent significant performance degradation involved with
doing so much filtering regardless of cursor position within the
document?
is there any way to explicitly define parent containers in $.live
rather than using the default of document?
Leon