title: login.microsoft.com and graph.microsoft.com POST requests taking between 3 and 5 seconds Response times under load of 100 concurrent users
body: <p>We are working on Azure hosted App services (App Gateway--&gt; APIM--&gt; Function Apps---&gt; Azure SQL) and we use Azure B2C hosted in US.</p>
  <p>We are performing load test on some of the APIs and that in turn makes calls to login.microsoftonline.com and graph.microsoftonline.com. The load is 100 concurrent users and our Azure B2C doesnt contain more than 1000 records. We are observing that some of the calls (POST calls) to login.microsoftonline.com and graph.microsoft.com (GET request) is taking anywhere between 3seconds to 6 seconds.
  <a href="https://i.stack.imgur.com/tI6DI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tI6DI.png" alt="enter image description here" /></a></p>
  <p>Does anyone know if this is known issue as these are pure out of the box calls to microsoft Azure Active directory and nothing more than getting Auth Token and Getting a profile from Azure AD (B2C).</p>
  <p>Appreciate your insight on this.</p>
  <p>Thank you,</p>