expeditious
ˌɛkspɪˈdɪʃəs
adjective
done with speed and efficiency.
an expeditious investigation
speedy,swift,quick,rapid,fast,prompt,punctual,immediate,instant,sudden,high-speed,fast-track,whistle-stop,lightning,meteoric,whirlwind,brisk,nimble,efficient,diligent,hasty,summary,abrupt,fleet,rathe