go语言中rows.Next性能问题

下面代码中 因为数据也不算太大2W多条，但是rows.Next() 竟然执行了1分多钟，我换回C#10来秒，这让我很不理解，有大神能提点下吗？不胜感激

func queryLineInfo() string {

loginfo(log_info, log_project, "数据查询开始!")
rows, err = QuerySql(sqlstr)
loginfo(log_info, log_project, "数据查询结束!")
if err != nil {
    rows.Close()
    //fmt.Println("数据库查询失败", err)
    get_lineinfo.Rescode = "0000"
    get_lineinfo.Resmsg = "数据库查询失败！"
}
var databuff []get_lineinfo_buff
loginfo(log_info, log_project, "数据组织开始!")
for rows.Next() {
    var buff get_lineinfo_buff
    err = rows.Scan(&buff.LineNo, &buff.LineName, &buff.Station_id, &buff.Station_Order, &buff.Station_Name, &buff.IsUpDown, &buff.Status, &buff.Price, &buff.StartTime, &buff.EndTime)
    if err != nil {
        rows.Close()
        loginfo(log_error, log_project, "rows.Scan失败："+err.Error())
        get_lineinfo.Rescode = "0002"
        get_lineinfo.Resmsg = "数据解析失败！"
    } else {
        get_lineinfo.Rescode = "0001"
        get_lineinfo.Resmsg = "数据获取成功！"
        databuff = append(databuff, buff)

    }

}

rows.Close()
get_lineinfo.Data = databuff
loginfo(log_info, log_project, "JSON转换开始!")
if jsonstr, err = json.Marshal(get_lineinfo); err != nil {
    fmt.Println("Json", err)

}
loginfo(log_info, log_project, "JSON转换结束!")
return string(jsonstr)

}