velocius quam asparagi coquantur
more rapidly than asparagus will be cooked
Or simply "faster than cooking asparagus". Ascribed to Augustus by Suetonius (The Lives of the Twelve Caesars, Book 2 (Augustus), para. 87). Can refer to anything done very quickly. A very common variant is celerius quam asparagi cocuntur ("more swiftly than asparagus is cooked").