Jonathan, I have downloaded the jsonrpclib and rerun the SSL without Sessions test again. MUCH better:
ADD TWO NUMBERS ================================== JSON-RPC: 102.86 ms XML-RPC: 62.83 ms Result: XML won by: 40.04 ms CONCATENATE TWO STRINGS ================================== JSON-RPC: 47.32 ms XML-RPC: 44.36 ms Result: XML won by: 2.96 ms HANDLE BOOLEAN VALUE ================================== JSON-RPC: 46.76 ms XML-RPC: 46.00 ms Result: XML won by: 0.76 ms HANDLE DATETIME VALUE ================================== JSON-RPC: 46.08 ms XML-RPC: 44.43 ms Result: XML won by: 1.65 ms HANDLE COMPLEX OBJECTS ================================== JSON-RPC: 49.72 ms XML-RPC: 52.04 ms Result: JSON won by: 2.32 ms FINAL RESULTS ================================== JSON-RPC Average Time: 58.55 ms JSON-RPC Total Time Taken: 9870.03 ms XML-RPC Average Time: 49.93 ms XML-RPC Total Time Taken: 9006.83 ms Result: XML won by: 8.62 ms