 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 .
<meaning-changed>  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, obtaining a 8-16\times speedup with a slight reduction in accuracy .