diff --git a/lib/inc/drogon/HttpAppFramework.h b/lib/inc/drogon/HttpAppFramework.h
index 7aa5cf6e..bdd55bac 100755
--- a/lib/inc/drogon/HttpAppFramework.h
+++ b/lib/inc/drogon/HttpAppFramework.h
@@ -17,7 +17,6 @@
 #include <drogon/config.h>
 #if USE_ORM
 #include <drogon/orm/DbClient.h>
-#define USE_FAST_CLIENT 1
 #endif
 #include <drogon/utils/Utilities.h>
 #include <drogon/HttpBinder.h>
@@ -187,10 +186,8 @@ class HttpAppFramework : public trantor::NonCopyable
     virtual void setServerHeaderField(const std::string &server) = 0;
 #if USE_ORM
     virtual orm::DbClientPtr getDbClient(const std::string &name = "default") = 0;
-#if USE_FAST_CLIENT
     virtual void enableFastDbClient() = 0;
     virtual orm::DbClientPtr getFastDbClient(const std::string &name = "default") = 0;
-#endif
     virtual void createDbClient(const std::string &dbType,
                                 const std::string &host,
                                 const u_short port,
diff --git a/lib/src/ConfigLoader.cc b/lib/src/ConfigLoader.cc
index 4af798a2..8cbdfe27 100644
--- a/lib/src/ConfigLoader.cc
+++ b/lib/src/ConfigLoader.cc
@@ -229,12 +229,10 @@ static void loadApp(const Json::Value &app)
     auto kickOffTimeout = app.get("idle_connection_timeout", 60).asUInt64();
     drogon::app().setIdleConnectionTimeout(kickOffTimeout);
 #if USE_ORM
-#if USE_FAST_CLIENT
     //Fast db client
     auto fastDbClient = app.get("enable_fast_db_client", false).asBool();
     if (fastDbClient)
         drogon::app().enableFastDbClient();
-#endif
 #endif
     auto server = app.get("server_header_field", "").asString();
     if(!server.empty())
diff --git a/lib/src/HttpAppFrameworkImpl.cc b/lib/src/HttpAppFrameworkImpl.cc
index 1db02b24..97a8e308 100755
--- a/lib/src/HttpAppFrameworkImpl.cc
+++ b/lib/src/HttpAppFrameworkImpl.cc
@@ -16,10 +16,8 @@
 #include "ConfigLoader.h"
 #include "HttpServer.h"
 #if USE_ORM
-#if USE_FAST_CLIENT
 #include "../../orm_lib/src/DbClientLockFree.h"
 #endif
-#endif
 #include <drogon/HttpTypes.h>
 #include <drogon/utils/Utilities.h>
 #include <drogon/DrClassMap.h>
@@ -68,8 +66,9 @@ static void godaemon(void)
     close(1);
     close(2);
 
-    open("/dev/null", O_RDWR);
-    int ret = dup(0);
+    int ret = open("/dev/null", O_RDWR);
+    (void)ret;
+    ret = dup(0);
     (void)ret;
     ret = dup(0);
     (void)ret;
@@ -373,11 +372,9 @@ void HttpAppFrameworkImpl::run()
 #endif
 
 #if USE_ORM
-#if USE_FAST_CLIENT
     // Create fast db clients for every io loop
     if (_enableFastDbClient)
         createFastDbClient(ioLoops);
-#endif
 #endif
     _httpCtrlsRouter.init(ioLoops);
     _httpSimpleCtrlsRouter.init(ioLoops);
@@ -414,7 +411,6 @@ void HttpAppFrameworkImpl::run()
     loop()->loop();
 }
 #if USE_ORM
-#if USE_FAST_CLIENT
 void HttpAppFrameworkImpl::createFastDbClient(const std::vector<trantor::EventLoop *> &ioloops)
 {
     for (auto &iter : _dbClientsMap)
@@ -433,7 +429,6 @@ void HttpAppFrameworkImpl::createFastDbClient(const std::vector<trantor::EventLo
     }
 }
 #endif
-#endif
 void HttpAppFrameworkImpl::onWebsockDisconnect(const WebSocketConnectionPtr &wsConnPtr)
 {
     auto wsConnImplPtr = std::dynamic_pointer_cast<WebSocketConnectionImpl>(wsConnPtr);
@@ -813,12 +808,10 @@ orm::DbClientPtr HttpAppFrameworkImpl::getDbClient(const std::string &name)
 {
     return _dbClientsMap[name];
 }
-#if USE_FAST_CLIENT
 orm::DbClientPtr HttpAppFrameworkImpl::getFastDbClient(const std::string &name)
 {
     return _dbFastClientsMap[name][trantor::EventLoop::getEventLoopOfCurrentThread()];
 }
-#endif
 void HttpAppFrameworkImpl::createDbClient(const std::string &dbType,
                                           const std::string &host,
                                           const u_short port,
diff --git a/lib/src/HttpAppFrameworkImpl.h b/lib/src/HttpAppFrameworkImpl.h
index 6beeb579..5101c880 100644
--- a/lib/src/HttpAppFrameworkImpl.h
+++ b/lib/src/HttpAppFrameworkImpl.h
@@ -119,13 +119,11 @@ class HttpAppFrameworkImpl : public HttpAppFramework
 
 #if USE_ORM
     virtual orm::DbClientPtr getDbClient(const std::string &name = "default") override;
-#if USE_FAST_CLIENT
     virtual void enableFastDbClient() override
     {
         _enableFastDbClient = true;
     }
     virtual orm::DbClientPtr getFastDbClient(const std::string &name = "default") override;
-#endif
     virtual void createDbClient(const std::string &dbType,
                                 const std::string &host,
                                 const u_short port,
@@ -214,11 +212,9 @@ class HttpAppFrameworkImpl : public HttpAppFramework
 #if USE_ORM
     std::map<std::string, orm::DbClientPtr> _dbClientsMap;
     std::vector<std::function<void()>> _dbFuncs;
-#if USE_FAST_CLIENT
     std::map<std::string, std::map<trantor::EventLoop *, orm::DbClientPtr>> _dbFastClientsMap;
     void createFastDbClient(const std::vector<trantor::EventLoop *> &ioloops);
 #endif
-#endif
 };
 
 } // namespace drogon
diff --git a/lib/src/HttpClientImpl.h b/lib/src/HttpClientImpl.h
index 4ba4f981..fab55b9a 100644
--- a/lib/src/HttpClientImpl.h
+++ b/lib/src/HttpClientImpl.h
@@ -36,7 +36,7 @@ class HttpClientImpl : public HttpClient, public std::enable_shared_from_this<Ht
     trantor::EventLoop *_loop;
     trantor::InetAddress _server;
     bool _useSSL;
-    void sendReq(const trantor::TcpConnectionPtr &connectorPtr, const HttpRequestPtr &req);
+    void sendReq(const trantor::TcpConnectionPtr &connPtr, const HttpRequestPtr &req);
     void sendRequestInLoop(const HttpRequestPtr &req, const HttpReqCallback &callback);
     std::queue<std::pair<HttpRequestPtr, HttpReqCallback>> _reqAndCallbacks;
     void onRecvMessage(const trantor::TcpConnectionPtr &, trantor::MsgBuffer *);
diff --git a/lib/src/HttpRequestParser.h b/lib/src/HttpRequestParser.h
index bcf2a63b..098cfdd9 100755
--- a/lib/src/HttpRequestParser.h
+++ b/lib/src/HttpRequestParser.h
@@ -52,17 +52,12 @@ class HttpRequestParser
         _request.reset(new HttpRequestImpl(_loop));
     }
 
-    const HttpRequestPtr request() const
-    {
-        return _request;
-    }
+    // const HttpRequestPtr &request() const
+    // {
+    //     return _request;
+    // }
 
-    HttpRequestImplPtr request()
-    {
-        return _request;
-    }
-
-    HttpRequestImplPtr requestImpl()
+    const HttpRequestImplPtr &requestImpl() const
     {
         return _request;
     }
@@ -76,7 +71,7 @@ class HttpRequestParser
         }
         return false;
     }
-    WebSocketConnectionPtr webSocketConn()
+    const WebSocketConnectionPtr &webSocketConn() const
     {
         return _websockConnPtr;
     }
diff --git a/lib/src/HttpServer.cc b/lib/src/HttpServer.cc
index 45ccca3e..095aebdc 100755
--- a/lib/src/HttpServer.cc
+++ b/lib/src/HttpServer.cc
@@ -123,10 +123,10 @@ void HttpServer::onMessage(const TcpConnectionPtr &conn,
         requestParser->requestImpl()->setPeerAddr(conn->peerAddr());
         requestParser->requestImpl()->setLocalAddr(conn->localAddr());
         requestParser->requestImpl()->setReceiveDate(trantor::Date::date());
-        if (requestParser->firstReq() && isWebSocket(conn, requestParser->request()))
+        if (requestParser->firstReq() && isWebSocket(conn, requestParser->requestImpl()))
         {
             auto wsConn = std::make_shared<WebSocketConnectionImpl>(conn);
-            _newWebsocketCallback(requestParser->request(),
+            _newWebsocketCallback(requestParser->requestImpl(),
                                   [=](const HttpResponsePtr &resp) mutable {
                                       if (resp->statusCode() == k101SwitchingProtocols)
                                       {
@@ -138,7 +138,7 @@ void HttpServer::onMessage(const TcpConnectionPtr &conn,
                                   wsConn);
         }
         else
-            onRequest(conn, requestParser->request());
+            onRequest(conn, requestParser->requestImpl());
         requestParser->reset();
     }
 }
diff --git a/orm_lib/src/DbClientImpl.h b/orm_lib/src/DbClientImpl.h
index 6b14da40..57f75f27 100644
--- a/orm_lib/src/DbClientImpl.h
+++ b/orm_lib/src/DbClientImpl.h
@@ -84,7 +84,7 @@ class DbClientImpl : public DbClient, public std::enable_shared_from_this<DbClie
                const size_t paraNum,
                std::vector<const char *> &&parameters,
                std::vector<int> &&length,
-               std::vector<int> format,
+               std::vector<int> &&format,
                QueryCallback &&cb,
                ExceptPtrCallback &&exceptCb)
             : _sql(std::move(sql)),
@@ -100,7 +100,7 @@ class DbClientImpl : public DbClient, public std::enable_shared_from_this<DbClie
     std::deque<std::shared_ptr<SqlCmd>> _sqlCmdBuffer;
     std::mutex _bufferMutex;
 
-    void handleNewTask(const DbConnectionPtr &conn);
+    void handleNewTask(const DbConnectionPtr &connPtr);
 };
 
 } // namespace orm
diff --git a/orm_lib/src/DbClientLockFree.h b/orm_lib/src/DbClientLockFree.h
index 40734447..26b694cd 100644
--- a/orm_lib/src/DbClientLockFree.h
+++ b/orm_lib/src/DbClientLockFree.h
@@ -66,7 +66,7 @@ class DbClientLockFree : public DbClient, public std::enable_shared_from_this<Db
                const size_t paraNum,
                std::vector<const char *> &&parameters,
                std::vector<int> &&length,
-               std::vector<int> format,
+               std::vector<int> &&format,
                QueryCallback &&cb,
                ExceptPtrCallback &&exceptCb)
             : _sql(std::move(sql)),
diff --git a/orm_lib/src/mysql_impl/MysqlResultImpl.h b/orm_lib/src/mysql_impl/MysqlResultImpl.h
index 7f031e3f..0e12bcbc 100644
--- a/orm_lib/src/mysql_impl/MysqlResultImpl.h
+++ b/orm_lib/src/mysql_impl/MysqlResultImpl.h
@@ -68,7 +68,7 @@ class MysqlResultImpl : public ResultImpl
     }
     virtual size_type size() const noexcept override;
     virtual row_size_type columns() const noexcept override;
-    virtual const char *columnName(row_size_type Number) const override;
+    virtual const char *columnName(row_size_type number) const override;
     virtual size_type affectedRows() const noexcept override;
     virtual row_size_type columnNumber(const char colName[]) const override;
     virtual const char *getValue(size_type row, row_size_type column) const override;
diff --git a/orm_lib/src/postgresql_impl/PostgreSQLResultImpl.h b/orm_lib/src/postgresql_impl/PostgreSQLResultImpl.h
index dcd4795e..cce4c3d1 100644
--- a/orm_lib/src/postgresql_impl/PostgreSQLResultImpl.h
+++ b/orm_lib/src/postgresql_impl/PostgreSQLResultImpl.h
@@ -35,7 +35,7 @@ class PostgreSQLResultImpl : public ResultImpl
     }
     virtual size_type size() const noexcept override;
     virtual row_size_type columns() const noexcept override;
-    virtual const char *columnName(row_size_type Number) const override;
+    virtual const char *columnName(row_size_type number) const override;
     virtual size_type affectedRows() const noexcept override;
     virtual row_size_type columnNumber(const char colName[]) const override;
     virtual const char *getValue(size_type row, row_size_type column) const override;
diff --git a/orm_lib/src/sqlite3_impl/Sqlite3ResultImpl.h b/orm_lib/src/sqlite3_impl/Sqlite3ResultImpl.h
index 715cb3f1..fb4ffe1c 100644
--- a/orm_lib/src/sqlite3_impl/Sqlite3ResultImpl.h
+++ b/orm_lib/src/sqlite3_impl/Sqlite3ResultImpl.h
@@ -29,13 +29,13 @@ namespace orm
 class Sqlite3ResultImpl : public ResultImpl
 {
   public:
-    Sqlite3ResultImpl(const std::string &query) noexcept
+    explicit Sqlite3ResultImpl(const std::string &query) noexcept
         : ResultImpl(query)
     {
     }
     virtual size_type size() const noexcept override;
     virtual row_size_type columns() const noexcept override;
-    virtual const char *columnName(row_size_type Number) const override;
+    virtual const char *columnName(row_size_type number) const override;
     virtual size_type affectedRows() const noexcept override;
     virtual row_size_type columnNumber(const char colName[]) const override;
     virtual const char *getValue(size_type row, row_size_type column) const override;