like a bat out of hell

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 a jiffy in nothing flat lickety split 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

expeditiously hastily hurriedly immediately instantaneously instantly promptly rapidly speedily swiftly

apace chop-chop quick

briskly flat-out fleetly full tilt in a flash in haste in nothing flat in short order lickety-split like a flash like a shot pronto swift

eventually later slowly