Update chart with dynamic data without redrawing the whole chart (without blinking)

The following example showed on c3.js has a dynamic data input and there is no blinking on update.
http://c3js.org/samples/data_load.html

but the c3-angular example will redraw on each update (blinking)
http://jettro.github.io/c3-angular-directive/examples/index.html#/dynamic

Is this related to some configuration? thanks.