danvk/dygraphs — pull request #286 by shawno1059 (2013-11-25 22:19:56+00:00)
Title: Speed up renerding of stacked graph when stackedGraphNaNFill = 'none'

This is a partial fix for Issue 497:	Stacked charts with lots of data and null values are slow to render. If stackedGraphNaNFill = 'none', we can avoid the loop in updateNextPoint, by not calling it.