optimize code

test=develop

paddle/fluid/operators/reader/ctr_reader.cc

@@ -261,7 +261,8 @@ static inline void parse_csv_line(
     string_split(slot_data, ',', &data_in_slot_str);
     std::vector<int64_t> data_in_slot;
     for (auto& data_str : data_in_slot_str) {
-      (*sparse_datas)[i].push_back(std::stol(data_str));
+      auto id = std::stol(data_str);
+      (*sparse_datas)[i].push_back(id);
     }
   }
 }

paddle/fluid/operators/reader/read_op.cc

@@ -36,7 +36,6 @@ class ReadInferShape : public framework::InferShapeBase {
       ctx->SetOutputsDim("Out", reader_dims);
       auto in_desc =
           boost::get<framework::VarDesc*>(ctx->GetInputVarPtrs("Reader")[0]);
-      std::cout << in_desc->Proto()->SerializeAsString() << std::endl;
       auto in_lod_levels = in_desc->GetLoDLevels();
       auto out_var_ptrs = ctx->GetOutputVarPtrs("Out");
       PADDLE_ENFORCE_EQ(in_lod_levels.size(), out_var_ptrs.size(),