Can not reproduce the comparative results with BEVFormer

[Zixin-Lei]

Hi!
Thanks a lot for the open-source project!
However, I failed to reproduce the experimental results, i.e. the high FPS compared with BEVFormer.
May I ask if you have made the size of BEV query the same when doing comparison with BEVFormer? It would be great if you could share your code of the comparative experiment between GKT and BEVFormer.