Google pub/sub client high latency inside java web servlet in appengine

[kassemshehady]

I try this example to use Google pub/sub java example to push messages inside app-engine servlet, however my logs shows latency up to 11 seconds when my servers are overloaded.

Any idea about this issue?

https://github.com/GoogleCloudPlatform/cloud-pubsub-samples-java/blob/master/appengine-push/src/main/java/com/google/cloud/pubsub/client/demos/appengine/servlet/SendMessageServlet.java