in a jiffy

agile brisk hot nimble quick rapid swift

accelerated active dashing electric flashing fleet fleeting flying hurried racing ready snap split-second winged

PDQ blue streak breakneck double-time expeditious expeditive hairtrigger hasty hypersonic in nothing flat lickety split like a bat out of hell like all get out like crazy like mad on the double posthaste presto pronto screamin' snappy speedball supersonic velocious

clumsy slow

dull

plodding tardy unhurried

directly first promptly recently right away soon timely

betimes

at once freshly in an instant in no time instantaneously instantly newly presto primitively seasonably straightaway summarily thereon thereupon without delay

later

late

directly forthwith instantly promptly rapidly shortly soon urgently

now

PDQ anon at short notice away double-time hereupon in a New York minute in a flash in nothing flat instantaneously instanter like now now or never on the dot on the double on the spot pronto right now soon afterward straight away straight off summarily thereupon this instant this minute tout de suite unhesitatingly without delay without hesitation

later

eventually never

in a second instantaneously instantly quickly

cheerfully eagerly easily freely gladly immediately promptly willingly

at once at the drop of a hat facilely hands down in no time lightly no sweat nothing to it piece of cake quick as a wink right away slick as whistle smoothly speedily straight away swimmingly unhesitatingly well without delay without demur without difficulty without hesitation

difficultly grudgingly unwillingly