nvda 2016.2 and newer versions are all very sluggish.
2017.1 is better, but nvda versions 2014 and 2015 had not such
sluggishness for me.
16.4 because iit released in one of the best day, i even helped in its
help translations and published its good news,
so, i love it and decided to use it forever.

--
By God,
were I given all the seven heavens
with all they contain
in order that
I may disobey God
by depriving an ant
from the husk of a grain of barley,
I would not do it.
imam ali