change driver_cloud_grpc_client_stream.

src/driver/driver_cloud_grpc_client_stream/grpcclient.cpp

@@ -31,7 +31,7 @@ grpcclient::grpcclient(std::string stryamlpath)
 qint64 grpcclient::calclatency(qint64 nnewlatency)
 {
     mvectorlatency.push_back(nnewlatency);
-    while(mvectorlatency.size()>30)mvectorlatency.erase(mvectorlatency.begin());
+    while(mvectorlatency.size()>5)mvectorlatency.erase(mvectorlatency.begin());
     qint64 nlatencytotal =0;
     int nsize = mvectorlatency.size();
     int i;