We’ve noticed since Nov 2016 it’s taking a very long time to get a response ( ~ 30 mins ) when querying for a campaign within a short time frame (less than one week, June 20 - 26 for instance).
Initially we opened a ticket here Ads API is incredibly slow at the moment with two different questions. We opted to disregard the second question to focus on the main issue. The main issue was acknowledged and the ticket was closed that day.
We’d like to know if there has been any update since?
Thanks, have an excellent day!