Are you talking about this paper:

- https://cdn.openai.com/papers/whisper.pdf

maybe I missed it but I can't find any place in that paper where they talk about the trade-offs with respect to real time factor and decoding strategies. RTF vs acc curves for CPU vs GPU for STT typically vary not in terms of absolute performance but in terms of where along the RTF curve you achieve a particular accuracy. That impacts what kinds of tasks you can expect to use the model for, and how you can expect to scale it to real world applications. So far this has been the weakest point for all the Whisper related work (still better off with espnet, k2, speechbrain, etc). This information would be interesting to see if they have it.