Whats the location of the Vm and the location from where you accessed it?
Whats the deployed OS on that VM?
You can check the vm performance by checking the amount of CPU, Memory, Network and disk IO etc.
These info can be seen from the portal or you can login to the vm and execute some commands and check .
For windows you can open task manager and check the resource usages.
For linux you can use commands like top, free, iotop etc.