Results for GroupedList-mount_base.data.js => GroupedList-mount.data.js

numTicks: 53512 => 2171

Potential Regressions: 
 ~28418, time consumed: 50% => 65% 
 ~77430, time consumed: 1% => 22% 

New Functions: 
 ~Customizations.unobserve, time consumed = 11%
 ~List._onAsyncScroll, time consumed = 25%