Google App Engine application instance recycling and response times

Question

I posted this on GAE for Java group, but I hope to get some answers here quicker :)

I decided to do some long-run performance tests on my application. I created some

Answer 1

SDK 1.4.0 has this new feature:

• Developers can now enable Warmup Requests. By specifying a handler in an app's appengine-web.xml, App Engine will attempt to to send a Warmup Request to initialize new instances before a user interacts with it. This can reduce the latency an end-user sees for initializing your application.