Performance Delay with Multiple ListStatusChangesAsync Calls Using Custom Fields

We are using the ListStatusChangesAsync API to retrieve DocuSign envelopes for multiple account numbers. For each account number, a separate API request is sent to fetch the related envelope details, including documents and custom fields. All requests are executed in parallel, and the responses are combined into a single result set.

We have observed that the loading time increases as the number of account numbers increases. We would like to understand the following:

• Does DocuSign apply any throttling or delays when multiple API requests are executed simultaneously?
• Is there a recommended limit for concurrent API requests?
• Does retrieving additional information, such as documents and custom fields, significantly affect performance?
• Is there a more efficient approach for retrieving envelopes associated with multiple account numbers?

Any suggestions or best practices would be greatly appreciated.