splitting
like a rat up a drainpipe
superspeedy
volley
hell-for-leather
hand over hand
ultrarapid
hyperfast
lightningly
lightning fast
superfast
quick as a flash
mile-a-minute
blazingly
apace
blazing
at full tilt
blistering
faster than Minute Rice
like shit through a goose
superquick
speed of light
lightning-quick
like a scalded cat
like a scalded dog
like a raped ape
quicker than scat
like the wind
good lick
exponentially
feverishly
speedingly
bullet
prestissimo
overspeedy
full pelt
at speed
mile a minute
nineteen to the dozen
briskly
in no time
like winkin
before one knows where one is
flying
fast-flying
quickly
superspeed
like winking
amain
at a rate of knots
nippy
with a quickness
full tilt
furiously
before you can say knife
before you can say Jack Robinson
velocitous
hasty
fast
hot
velocious
headlong
streak
in a jiffy
lightspeed
rapidly
fast-moving
in full flow
balls-out
pacey
on the wings of the wind
hyperspeed
fastish
post-haste
tachy-
hyperaccelerated
pokey
superconvergent
whip through
smartish
swift
rate
fleet
fastgoing
speedfully
high-tempo
precipitate
lickety
whip and spur
turn of pace
trucking
crash
shoot
quickening
in quick sticks
like a dose of salts