PDQ
agilely
amain
animatedly
anxiously
apace
at flank speed
at once
at the double
avidly
breathlessly
briefly
by forced marches
cursorily
decisively
directly
double-quick
eagerly
enthusiastically
expeditiously
fast
feverishly
flat-out
fleetingly
flickeringly
flittingly
for a moment
forthwith
furiously
hand over fist
hand over hand
hastily
headlong
hell for leather
hell-bent
hell-bent for election
helter-skelter
hotfoot
hurriedly
hurry-scurry
immediately
impatiently
impetuously
impulsively
in an instant
in double time
in double-quick time
in high
in high gear
in no time
Stickley
prickly
sickly
slickly
thickly