106291 2013-01-07 20:00:06 -0800 [Meta][Shadow] Incremental distribution 2013-01-07 21:07:30 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Unspecified Unspecified RESOLVED LATER P2 Normal --- 103016 1 shinyak webcomponents-bugzilla dominicc webcomponents-bugzilla oldest_to_newest 801951 0 shinyak 2013-01-07 20:00:06 -0800 Currently when an element is added/removed to/from host element, whole distribution happens. However, in some cases, we can skip such distribution. This will significantly improve ShadowDOM performance. We assume that content does not have some kinds of select attribute (e.g. div:first-of-type, etc.) here. if this assumption does not hold, it's safer to cause whole distribution. When removing an element: we can just remove an element from distributed element. When adding an element: find the first InsertionPoint the element will be distributed to, and add to it. (You have to care about node order.) 801989 1 dominicc 2013-01-07 21:07:30 -0800 We don’t know that this is a performance problem yet, and it will complicate the code. I would prefer to improve the quality of existing code first before embarking on this.