title: Google Oauth2 authentication takes about 15 seconds
body: <p>I am using <a href="https://github.com/google/google-api-php-client" rel="nofollow">google-php-api</a> for authentication.</p>
  
  <p>this takes most of the time just under 6 seconds,
  <code>$client->authenticate($code);</code></p>
  
  <p>this takes most of the time about 3 seconds,
  <code>$token = $client->getAccessToken();</code></p>
  
  <p>this takes most of the time just under 6 seconds too.
  <code>$client->$data = $client->verifyIdToken($tokens->id_token)</code></p>
  
  <p>Any idea why, or is it normal?</p>