WordNet (r) 3.0 (2006):

in no time
    adv 1: in a relatively short time; "she finished the assignment
           in no time" [syn: in no time, very fast]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "in no time":
   PDQ, apace, at once, decisively, directly, expeditiously,
   forthwith, immediately, in a bit, in a flash, in a jiff,
   in a jiffy, in a moment, in a second, in a trice, in a twink,
   in a twinkling, in a wink, in an instant, in nothing flat,
   in short order, in two shakes, instantaneously, instanter,
   instantly, like a shot, on the instant, on the spot,
   pretty damned quick, promptly, pronto, quickly, right away,
   right off, smartly, speedily, straightaway, straightway, subito,
   summarily, swiftly, tout de suite, with all speed, without delay,
   without further delay