RequestFactory slow on Android

I am using RequestFactory with appengine and android. It has been working great, however when I retrieve a list of objects of any size(around 400) it has a very delayed response. It appears that the transfer of data happens fairly quickly(~4 secs), however I do not get the onSuccess() callback until much later(1-2 mins or greater). I am guessing this could be slow performance of parsing withi开发者_开发百科n requestfactory. My objects are just POJOs with about 10 fields of text and longs.

My question is has anyone come across this? Anyone have a more efficient way to get lots of data off of appengine quickly in android?

UPDATE: I also have ran into outofmemoryerrors when using RF with lots of entities(3000+). I switched to straight json using the GSON lib and parsing was quicker and have not ran into memory problems yet.

The specific Entity I am sending over the wire is below(I am using Objectify).

@Cached
@Entity
public class InterestPoint
{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

private Long groupId;
private String more, data;
@Unindexed
private int lat, longi;
@Unindexed
private String address, city, state;
@Unindexed
private int num1, num2, num3;
@Unindexed
private int num4,num5,num6;
@Unindexed
private String name;
@Unindexed
private int moreData;
@Unindexed
private String notes;
}

---

Adding to the author's description of the problem

We're retrieving 8 relatively small objects and each has one to four child objects which are tiny:

Here's an example of the stack after the response has been returned from the server, for over a minute it's in the org.json package or com.google.web.bindery and we have high cpu usage:

java.lang.AbstractStringBuilder append0 AbstractStringBuilder.java  143 false   
java.lang.StringBuilder append  StringBuilder.java  125 false   
org.json.JSONStringer   string  JSONStringer.java   344 false   
org.json.JSONStringer   value   JSONStringer.java   252 false   
org.json.JSONObject quote   JSONObject.java 713 false   
com.google.web.bindery.autobean.shared.impl.StringQuoter    quote   StringQuoter.java   69  false   
com.google.web.bindery.autobean.shared.impl.StringQuoter    create  StringQuoter.java   50  false   
com.google.web.bindery.autobean.shared.ValueCodex$Type$13   encode  ValueCodex.java 193 false   
com.google.web.bindery.autobean.shared.ValueCodex   encode  ValueCodex.java 315 false   
com.google.web.bindery.autobean.shared.impl.AutoBeanCodexImpl$ValueCoder    extractSplittable   AutoBeanCodexImpl.java  500 false   
com.google.web.bindery.autobean.shared.impl.AbstractAutoBean    setProperty AbstractAutoBean.java   277 false   
com.google.web.bindery.autobean.vm.impl.ProxyAutoBean   setProperty ProxyAutoBean.java  253 false   
com.google.web.bindery.autobean.vm.impl.BeanPropertyContext set BeanPropertyContext.java    44  false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext$3  visitValueProperty  AbstractRequestContext.java 910 false   
com.google.web.bindery.autobean.vm.impl.ProxyAutoBean   traverseProperties  ProxyAutoBean.java  289 false   
com.google.web.bindery.autobean.shared.impl.AbstractAutoBean    traverse    AbstractAutoBean.java   166 false   
com.google.web.bindery.autobean.shared.impl.AbstractAutoBean    accept  AbstractAutoBean.java   101 false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext    processReturnOperation  AbstractRequestContext.java 879 false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext    processReturnOperations AbstractRequestContext.java 1215    false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext    access$600  AbstractRequestContext.java 76  false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext$StandardPayloadDialect processPayload  AbstractRequestContext.java 347 false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext$5  onTransportSuccess  AbstractRequestContext.java 1108    false   
com.whichfestival.AndroidRequestTransport   send    AndroidRequestTransport.java    68  false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext    doFire  AbstractRequestContext.java 1102    false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext    fire    AbstractRequestContext.java 569 false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequest   fire    AbstractRequest.java    54  false   
com.google.web.bindery.requestfactory.shared.impl.AbstractRequest   fire    AbstractRequest.java    59  false   
com.whichfestival.FetchTopService   getEvents   FetchTopService.java    99  false   
com.whichfestival.FetchTopService   onHandleIntent  FetchTopService.java    56  false   
android.app.IntentService$ServiceHandler    handleMessage   IntentService.java  59  false   
android.os.Handler  dispatchMessage Handler.java    99  false   
android.os.Looper   loop    Looper.java 130 false   
android.os.HandlerThread    run HandlerThread.java  60  false   

And we see the GC kick in about 25 times:

11-16 22:30:28.464: D/dalvikvm(416): GC_CONCURRENT freed 930K, 51% free 3321K/6727K, external 1654K/2137K, paused 15ms+10ms

11-16 22:30:33.605: D/dalvikvm(416): GC_CONCURRENT freed 515K, 49% free 3452K/6727K, external 1654K/2137K, paused 10ms+13ms

11-16 22:30:37.554: D/dalvikvm(416): GC_CONCURRENT freed 638K, 49% free 3497K/6727K, external 1654K/2137K, paused 11ms+10ms

11-16 22:30:43.424: D/dalvikvm(416): GC_CONCURRENT freed 681K, 47% free 3572K/6727K, external 1654K/2137K, paused 6ms+9ms

all for about 15 small pojos... would appreciate any help. Absolutely desperate to solve this.