On Fri, Feb 12, 2010 at 2:19 PM, Anne van Kesteren <[email protected]> wrote: > On Fri, 22 Jan 2010 14:11:40 +0100, Anton Muhin <[email protected]> wrote: >> >> Is it possible to allow caching for those cases? Firefox caches those >> node lists for a long time (Maciej found the related bug >> https://bugzilla.mozilla.org/show_bug.cgi?id=140758). IE8 caches as >> well. Opera, Safari and Chrome do not. > > Sorry for the somewhat late reply. We'd prefer not to change the > specification here and keep the requirement. We're afraid of potential hard > to detect incompatibility bugs if you sometimes cache and sometimes don't. > We're also not convinced that you cannot get the performance win by other > means.
I see. One argument against potential bugs is both IE and FF do that, so I won't expect lots of people relying on this behaviour anyway. Regarding performance: if the spec mandates creation of new objects, that's something which is difficult to optimize away. thanks and yours, anton. > > > -- > Anne van Kesteren > http://annevankesteren.nl/ >
