diff --git a/http/app.h b/http/app.h
index 86cebd3..39829cb 100644
--- a/http/app.h
+++ b/http/app.h
@@ -80,7 +80,7 @@
 
     App& bindaddr(std::string bindaddr)
     {
-        bindaddrStr = bindaddr;
+        bindaddrStr = std::move(bindaddr);
         return *this;
     }
 
diff --git a/http/http_server.h b/http/http_server.h
index c26e9e0..0ca7dea 100644
--- a/http/http_server.h
+++ b/http/http_server.h
@@ -37,12 +37,12 @@
         ioService(std::move(io)),
         acceptor(std::move(acceptorIn)),
         signals(*ioService, SIGINT, SIGTERM, SIGHUP), timer(*ioService),
-        handler(handlerIn), adaptorCtx(adaptor_ctx)
+        handler(handlerIn), adaptorCtx(std::move(adaptor_ctx))
     {}
 
     Server(Handler* handlerIn, const std::string& bindaddr, uint16_t port,
-           std::shared_ptr<boost::asio::ssl::context> adaptor_ctx,
-           std::shared_ptr<boost::asio::io_context> io =
+           const std::shared_ptr<boost::asio::ssl::context>& adaptor_ctx,
+           const std::shared_ptr<boost::asio::io_context>& io =
                std::make_shared<boost::asio::io_context>()) :
         Server(handlerIn,
                std::make_unique<boost::asio::ip::tcp::acceptor>(
@@ -52,8 +52,8 @@
     {}
 
     Server(Handler* handlerIn, int existing_socket,
-           std::shared_ptr<boost::asio::ssl::context> adaptor_ctx,
-           std::shared_ptr<boost::asio::io_context> io =
+           const std::shared_ptr<boost::asio::ssl::context>& adaptor_ctx,
+           const std::shared_ptr<boost::asio::io_context>& io =
                std::make_shared<boost::asio::io_context>()) :
         Server(handlerIn,
                std::make_unique<boost::asio::ip::tcp::acceptor>(
diff --git a/http/routing.h b/http/routing.h
index 52d1b06..59fa636 100644
--- a/http/routing.h
+++ b/http/routing.h
@@ -403,7 +403,7 @@
         return *p;
     }
 
-    self_t& name(std::string name) noexcept
+    self_t& name(const std::string& name) noexcept
     {
         self_t* self = static_cast<self_t*>(this);
         self->nameStr = std::move(name);
@@ -522,7 +522,7 @@
   public:
     using self_t = TaggedRule<Args...>;
 
-    TaggedRule(std::string ruleIn) : BaseRule(std::move(ruleIn))
+    TaggedRule(const std::string& ruleIn) : BaseRule(std::move(ruleIn))
     {}
 
     void validate() override
@@ -613,7 +613,7 @@
     }
 
     template <typename Func>
-    void operator()(std::string name, Func&& f)
+    void operator()(const std::string& name, Func&& f)
     {
         nameStr = std::move(name);
         (*this).template operator()<Func>(std::forward(f));