How could I troubleshoot slow docker pull?

[ปลาวาฬทราย RMUTT CPE IX]

I'm a cloud service provider, I built the private cloud. One customer said they pull the docker slow. How should I do? I don't know what the destination is to traceroute like in the traditional network troubleshooting.

time docker pull yugabytedb/yugabyte:2.15.3.0-b231

Thank you very much.

[marce1000]

                    - FYI : https://forums.docker.com/

 M.