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Re:Reactive prefetch on Google Search: 100-150ms speedup by cmelbye on Tuesday December 09, 2014 @03:54PM (#8725656)
I'm confused, isn't it an open standard? http://www.w3.org/html/wg/drafts/html/master/links.html#link...

Perhaps their implementation differs, but they even showed the JS they're using to perform the prefetch in the post. It doesn't seem like they're trying to hide anything.

Re:Reactive prefetch on Google Search: 100-150ms speedup by throwaway4719 on Tuesday December 09, 2014 @03:59PM (#8725694)
They kept the fact that they were going to deploy this on the search service that has a monopoly on search in EU secret until it was launched in Chrome. Before this, this link prefetching has seen very little use in the wild.
Re:Reactive prefetch on Google Search: 100-150ms speedup by LukeB_UK on Tuesday December 09, 2014 @06:28PM (#8726564)
They don't have to tell anyone what they're doing. As cmelbye stated, it's an open standard. Other browsers can implement it if they wish.