Temporal Cloud - Recommendations to reduce latency

We have been experimenting with temporal cloud and observed that while the server side metrics are as expected, the overall latency from the client side is relatively high. We tried to invoke the GetSystemInfo method via Java SDK and also using grpCurl and found that it was taking around 140ms.
We are on AWS (ap-south-1) and connected to temporal cloud in the same region.
Are there any recommendations on what can be done to reduce the network latency?
Does a private link help? Will transit gateway help?