Well, in fact the problem was ... the development mode of GWT. As I could not understand the problem, I tried to deploy the web app on tomcat and then the performances were almost the same for json and gwt serialization... Strange ...
But the performance remains surprising : in speed tracer I compared the performance of the json and GWT, and surprisingly the GWT request is bigger (I expected it would be smaller since there is less data to transmit) but it is faster (?) Mime-type application/json Total Bytes 6924 bytes Request Timing @1009ms for 33ms Response Timing @1042ms for 11ms Total Timing @1009ms for 44ms Mime-type application/x-java-serialized-object+gwt Total Bytes 13491 bytes Request Timing @6297ms for 17ms Response Timing @6314ms for 17ms Total Timing @6297ms for 34ms Bigger ? but still faster ? where is the logic ? I must be missing something ... Ben ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2701542
