We're testing a secure enclave on Alibaba Cloud in Singapore, ping is 50-100ms. Testing AWS in Sing next. (Alibaba's enclave is basically a copy-paste of AWS, but their networking for SEA is very good.)
Discussion
Is 50-100 ping from inside the enclave? Does enclave have network access by default or do you have to set it up somehow?
As low as 35ms for a light request from a test machine to the primary VM in Singapore (1700km one way), through vsock to enclave, light test process in enclave returns result, result sent back out the vsock and then from the primary VM back to the test machine.