mbostock/d3 — pull request #1576 by mbostock (2013-10-09 23:48:21+00:00)
Title: Defer first tick to end of timer frame.

Rather than interleave the initialization of transition tweens with their first tick, defer the first tick to the end of the current timer frame such that any DOM modifications that happen during the first tick do not trigger a forced relayout when another tween is initialized (e.g., getComputedStyle).