At EvilTrout's answer at HackerNews, I came across  https://github.com/eviltrout/ember-cloaking which will unload off-screen content while ie. infinite scrolling to boost performance.

How'd I go about achieving the same thing with jQuery Mobile?

Here is my test app  using Rails, jQuery Mobile and jQuery Infinite Scroll Helper:

https://github.com/frankie-loves-jesus/proper-infinite-scrolling

Thanks!