There is a great guide on Community around when you should do performance testing and how long the process takes.
Here is the page:
https://community.anaplan.com/t5/Testing-Phase/When-should-I-performance-test/ta-p/4345
I love the info. but the link isn't working, tried search functions but nothing is coming up. Would love to see the info. and get it to customer whom is reporting latency when their folks from HKG are accessing the model, no issues on the U.S.A side.