like wildfire

quick quickly rapidly soon swift swiftly

apace chop-chop expeditiously flat-out fleetly full tilt hastily hurriedly in a flash in haste in nothing flat in short order like a flash like a shot like greased lightning posthaste presto promptly pronto

slowly

slow

chop-chop double-time expeditiously fast flat-out fleetly full tilt hastily hurried hurriedly in a flash in double time in haste in high gear lickety-split like a shot like greased lightning promptly pronto quick quickly rapidly snappily speedily swift swiftly