WIP: Shortcut when number of distinct elements is hit

[gouthamve]

Signed-off-by: Goutham Veeramachaneni gouthamve@gmail.com

[okayzed]

looks awesome, thanks for this :-D

i'll let you update (with testing flags updated + your changes) before accepting

[okayzed]

merged in 6afa3b2d069b508d0c145715b9e680b72f71c0d2