The trick here is to figure out whether de-duping is observable by the author (other than as a performance gain). If it's not, it's a performance optimization by a user agent. If it is, it's a spec feature.
:DG< On Tue, Apr 9, 2013 at 10:53 AM, Scott Miles <[email protected]> wrote: > When writing polyfills for HTMLImports/CustomElements, we included a > de-duping mechanism, so that the same document/script/stylesheet is not (1) > fetched twice from the network and (2) not parsed twice. > > But these features are not in specification, and are not trivial as design > decisions. > > WDYT? > > Scott >
