Iryna Hello and I am sorry to hear about the slowness you are observing. I did locate your ticket with Support and understand that on your linux instance the network availability/bandwidth seems to be a potential culprit?
We do have a good article about testing network performance on linux instances here that might help in your investigation: https://support.sisense.com/kb/en/article/how-to-check-network-performance-in-linux
I'd recommend continuing the investigation with the team since there are a number of factors to consider but it seems we've made progress in ruling some of those out.
