No, lua is dynamically typed and very tiny, and "faster than light". For math brute force seems like "the scripting system of C" and for simple math (people say) in can be fastest that other compiled options (in JIT version), some people say that is faster than C++. You have var´s and tables, syntax is minimal, it´s more tolerant that gdscript to the "syntax inventions" (ej, You can add element to table with "[]" or "."), and have a tiny fast-math library that is really that we need to do calculations of movements, iterations, etc.... try Love2d or Gideros and you will see the ultra fast execution of math that luaJIT have.
I think that if it can be binded to Godot it will be the "math solution" that probably C++ can´t cover (really C++
doesn´t seem a realistic option, for donkeys like me is add too complexity to our small brain and we need this small brain to imagine gameplay things, and for avanced programers... well, there are complaints about a giantic type called variant that is very usefull for some things but seems not allow to do really fast computations (Other people can explain you better, source code of Godot is like a labyrinth to me). All of this can be wrong, there are conclusion reading test and real programmers stuff, playing with Love2D and GiderosMobile and seing the incredible velocity. Also you can go to bunnymark topic and see an example of a c++ module than power up calculations, but not a lot. I have a simple iteration test with Love2d (luaJIT) in this topic and you can see the performance.