one-handed
with one hand tied behind one's back
at a canter
in a walk
comfortably
in a jiffy
hands down
standing on one's head
readily
one step at a time
hotfoot
like a duck takes to water
eathlins
eath
unhasting
unhurriedly
instantaneously
quick
speedy
like sixty
effortless
smartish
at the drop of a hat
hasteless
incontinent
pressed for time
rapid fire
unspeedy
painless
unstumblingly
lope
superspeedy
amacrine
handily
like winkin
romp
on the nail
prestissimo
full pelt
unhesitantly
all of a sudden
in no time
mile a minute
undelayingly
snappy
fleeting
unhurrying
undelayedly
hasty
precipitate
precipitant
jack-easy
forthright
drumhead
summary
overhasty
precipitous
deliberate
unhurryingly
one could do it in one's sleep
toot suite
arrow
like shelling peas
slip
unrushed
lazily
like a shot
fast
like a dose of salts
quick as a flash
while we're young
pell-mell
careen
apace
hyperlegible
superquick
eat for breakfast
unbudgingly
whisk
in haste
at the high port
before you can say knife
before you can say Jack Robinson
instanter
quicker than scat
gently
by far
forthwith
like a rat up a drainpipe
quicksmart
jildi
smartly
make little of
one-two-three
chop-chop