What is slowing down my test app?

[Rick Horowitz]

I'm developing a GWT/App Engine app and using gwtrpccommlayer. I am performance testing some RPC requests to app engine using a standalone test app I wrote using:

    private static final GwtRpcService service = GwtRpcService.FACTORY.newInstance();

    private MyServiceAsync stub = service.create(...);

...

with RPC calls that look like this:

articleStub.getNewestArticle(new AsyncCallback<Article>() {

@Override

public void onSuccess(Article article) {

getComments(article);

}

@Override

public void onFailure(Throwable caught) {

caught.printStackTrace();

}

});

For some reason, I can only get 1 request every 2 seconds or so, even though appstats shows my requests taking about 5 milliseconds each. I tried a couple of things to speed it up:

1. Create my stubs in an init method that is only called once.

2. Create a Thread for each RPC test sequence.

While the Threads all get created very rapidly -- far less than a second -- requests only get processed 1 every 2 seconds. I am running WITHOUT billing. Does app engine meter requests to this level without billing, or could something else be causing this slow request processing?

I have uploaded the Test.java source file that includes the full code that contains the above code snippets.

Thanks in advance,

Rick