Can't reach higher fps

[bhsud]

Hello, I am using C++ environment to run tensorrt of depth anything, however, I got Time of per frame: 13ms(After convergence) by using following command:
./depth-anything-tensorrt depth_anything_vits14_518x518.engine testvideo.mp4

my computer hardware is NVIDIA RTX4090, CUDA Version: 11.6, TensorRT-8.6.0.12. And there is no any error happened during building and inference.
Do you have any suggestion to resolve this problem as I am seeing a 13ms vs. the reported 3ms in this repo.

Thank you