 Finally, we also present an efficient approximation to our approach which requires only one pass of both  encoders at inference time, obtaining a 8-16\times speedup with a small accuracydrop .
<fluency>  Finally, we also present an efficient approximation to our approach which requires only one pass of both  encoders at inference time, obtaining a 8-16\times speedup with a small accuracydrop .
 Finally, we also present an efficient approximation to our approach which requires only one pass of both encoders at inference time, achieving an 8-16\times speedup with a small accuracydrop .