the docs state:
"This is disabled by default in Sencha Touch as it has a performance impact when your application has vertical scrollers, plus, in most cases it is not very useful." state can someone please elaborate on the impact? I am thinking about adding vertical swipe support to catch swipe in the lower part of the screen, in order to pop a sheet component from the bottom of the page. several of my application's views scroll vertically and I was wondering what performance degradation to expect.