- Don't set the item class on the list item or it's btn-inner children until after the main processing loop. We now use a dictionary of item-classes to track what items get what set of classes and then set them all afterwards. This cuts down the per-item addClass() and children() function overhead significantly and gets us big wins on platforms like WP 7.5
- Use $.data() instead of $.fn.data() in buttonMarkup().
- Avoid excess function overhead with a filtered children() call by walking the DOM ourselves in listview code.
- Added _findFirstElementByTagName() which does basic DOM traversal to find the first of an element with the given nodeName. Use this in place of $.fn.closest() and $.fn.children() calls that filter with ":eq(0)".
- Avoid calling $.fn.add() if you can. The creation of the new collection is costing about 400 msecs.
- Avoid calling $() with markup for a single node, just use document.createElement() and pass it to $().
- Modified refresh() so that it manually checks for the first image in the list item or .ui-link-inherit element. This allows us to avoid executing a selector with a direct descendant and :eq(0) pseudo which is quite slow on WP 7.5 IE.
- Got rid of _itemApply() and moved it's functionality to the bottom of refresh(), doing finds from $list where we can, and li where we can't. Boom, at least 1200+ less function calls.
- Moved some of the finds we used to do for every item, out of the processing loop so we do just 3 big finds. This shaves off 200-300ms on iPad iOS 4.3.5.
- Modified buttonMarkup so that it checks options against undefined before calling jqmData(). This is necessary because false is a valid option.
- Modified listview so that it doesn't check for a data-counttheme unless it actually has a count item.
- Fixed header/footer code now listens for a custom event "contentmodified" on the document to figure out if it should be repositioned or not. Modified collapsible and listview to fire off contentmodified whenever they modify content. Developers can also fire off this event to trigger position updates for fixed headers/footers, so this could be used to address issue #2042 and the mention of collapsible in #2596.
Added a ui-li-has-count class for listview items that contain a count bubble. Changed default padding-right to 25px adjusting it to 75px when count bubble is present.
