Bitbucket members list API unexpected slow

Issue Summary

When performing a request to the Bitbucket REST API endpoint list users in a workspace the responses can be unexpectedly slow. 

Steps to Reproduce

1. Perform the GET /2.0/workspaces/{workspace}/members REST API endpoint.
2. Verify the time of the response.

Expected Results

Fast performance time.

Actual Results

Some seconds in the response time.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available