Back to BasicSettings due to performance issues.

Signed-off-by: drslebedev <[email protected]>

core/include/gnuradio-4.0/Block.hpp

@@ -527,7 +527,7 @@ class Block : public lifecycle::StateMachine<Derived>, protected std::tuple<Argu
     Block(std::initializer_list<std::pair<const std::string, pmtv::pmt>> initParameter) noexcept(false) : Block(property_map(initParameter)) {}
 
     Block(property_map initParameter = {}) noexcept(false)                                   // N.B. throws in case of on contract violations
-        : _settings(std::make_unique<CtxSettings<Derived>>(*static_cast<Derived *>(this))) { // N.B. safe delegated use of this (i.e. not used during construction)
+        : _settings(std::make_unique<BasicSettings<Derived>>(*static_cast<Derived *>(this))) { // N.B. safe delegated use of this (i.e. not used during construction)
 
         // check Block<T> contracts
         checkBlockContracts<decltype(*static_cast<Derived *>(this))>();