like the clappers
furiously
like a rat up a drainpipe
splitting
fizzing
mile-a-minute
precipitate
hell-for-leather
overquick
overspeedy
crash
like shit through a goose
fastish
rapid
nippy
apace
headlong
hasty
tough as nails
with dispatch
on the pdq
with a quickness
quick as a wink
before you can say knife
hyperaccreting
speedily
allegro non troppo
before you can say Jack Robinson
at a clip
ultrarapid
hand over hand
good lick
whip through
bullet
hurried
hot
speedingly
feverishly
prestissimo
fast
overfast
superspeedy
blistering
ultraquick
faster than Minute Rice
blazing
pacey
like sixty
exponentially
at speed