When we built our first CRM extension, we found that HubSpot had strict requirements for the response time to the data fetch request. If our app didn't respond within a # of milliseconds, the CRM extension displayed a load error.
Is there any official requirement for the response time of the data fetch? We are loading data from an on-premise system which may take over a second to respond. We want to make sure this won't be an issue before continuing development.