Commits on Mar 3, 2017

1. layout: Replace ConstructionResult::swap_out() with get() …

   It only actually swaps out in nonincremental mode (which isn't suitable
   for real world use), so the name is confusing.

   

   pcwalton authored and nox committed Mar 3, 2017
   198662f

2. script: Use a timer when rAF is used for non-animation purposes …

   After this patch, when the page calls `requestAnimationFrame()` too many
   times in the row without actually mutating the DOM, further calls to
   `rAF` will actually perform the moral equivalent of `setTimeout(16)`.
   This saves a lot of CPU time compared to actually waiting for the
   vertical blanking interval, because waiting for that requires us to draw
   the page.
   
   Reduces CPU usage drastically on nytimes.com, which has a perpetual
   `requestAnimationFrame()` loop that checks whether ads are in view.

   

   pcwalton authored and nox committed Mar 3, 2017

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