You take during peak or non-peak period? 
actually during peak is fastest. really fast close door and the
time gap between close door and moving off like 1 microsecond like
that. 
if non-peak, at jurong east, wait for the NSL train to come in...
city hall also wait... tanah merah also wait.. sometimes the train
operator switch at tanah merah also talk talk a bit..
so yup. peak is faster.