On 10/22/13 2:42 PM, Ryosuke Niwa wrote:
Because of HTMLCollection's name getter, all major browsers must be capable of a id+name lookup at every element (since Element has getElementsByTagName that returns a HTMLCollection).
While true, in practice pretty much no one uses the name getter on that object, so nothing right now forces browsers to implement it in a particularly efficient (as opposed to simple) way.
-Boris
