Use bind_front_handler:

The implementation uses bind_front_handler to reduce the
resources consumed when instantiating templates during
compilation.

include/boost/beast/http/impl/write.ipp

@@ -147,7 +147,7 @@ operator()()
             BOOST_ASSERT(! f.invoked);
             return boost::asio::post(
                 s_.get_executor(),
-                bind_handler(std::move(*this), ec, 0));
+                bind_front_handler(std::move(*this), ec, 0));
         }
         if(f.invoked)
         {
@@ -160,7 +160,7 @@ operator()()
     }
     return boost::asio::post(
         s_.get_executor(),
-        bind_handler(std::move(*this), ec, 0));
+        bind_front_handler(std::move(*this), ec, 0));
 }
 
 template<