C++读mysql数据表，遍历结果集然后返回Domain对象的list，一万条记录竟然需要3秒多，应该怎样优化？

这个函数要完成的任务是：

利用mysqlpp查询出结果集，然后遍历每一行记录，生成一个Domain对象，放到list中，最后返回一个Domain对象的list。

在做测试的时候，发现遍历一万条数据竟然需要3秒多……所以请大家帮忙把把脉，看应该如何优化：



完整的while循环，计时：3.338秒

注释掉第10行，计时：1.174秒

注释掉7-11行，计时：1.193秒

1. Connection* cOnn= ConnPool::getSingletonPtr()->getConn();

2. Query qr = conn->query(sql);

3. UseResult res = qr.use();



​// 开始计时

4. while(Row row = res.fetch_row()) // 循环10000条记录

5. {

6. Domain obj;

7. for(int i=0; i
8. {

9. // 调用Domain的成员函数，为Domain对象赋值

10. obj.setValue(res.fetch_field(i).name(), row[i]);

11. }

12. objList->push_back(obj);

13.}

// 结束计时

int procedureNo;

int index;

int employeeNo;

int procCount;

int state;

int procPermission;

int procDeadline;

int advanceAlert;

DateTime procTime;

int resultFlag;

string comment;

int flowDirection;

int isHideComment;

int isTrack;

DateTime arriveTime;

string preNodesJsonStr;

string nextNodesJsonStr;

string attachStr;

string employeeName;

DateTime employeeBirthDay;

void Domain::setValue(const char * colName, const Element& ele)

{

if(strcmp(colName,"column010") == 0)

procedureNo = ele;

else if(strcmp(colName,"column020") == 0)

index = ele;

else if(strcmp(colName,"column030") == 0)

employeeNo = ele;

else if(strcmp(colName,"column040") == 0)

procCount = ele;

else if(strcmp(colName,"column050") == 0)

state = ele;

else if(strcmp(colName,"column060") == 0)

procPermission = ele;

else if(strcmp(colName,"column070") == 0)

procDeadline = ele;

else if(strcmp(colName,"column080") == 0)

advanceAlert = ele;

else if(strcmp(colName,"column090") == 0)

procTime = ele;

else if(strcmp(colName,"column100") == 0)

resultFlag = ele;

else if(strcmp(colName,"column110") == 0)

comment = ele;

else if(strcmp(colName,"column120") == 0)

flowDirection = ele;

else if(strcmp(colName,"column130") == 0)

isHideComment = ele;

else if(strcmp(colName,"column140") == 0)

isTrack = ele;

else if(strcmp(colName,"column150") == 0)

arriveTime = ele;

else if(strcmp(colName,"column160") == 0)

preNodesJsOnStr= ele;

else if(strcmp(colName,"column170") == 0)

nextNodesJsOnStr= ele;

else if(strcmp(colName,"column180") == 0)

attachStr = ele;

else if(strcmp(colName,"column190") == 0)

employeeName = ele;

else if(strcmp(colName,"column200") == 0)

employeeBirthDay = ele;

}