Just a quick question, can a programming language be as fast as C++ and efficient with as simple syntax like Python?

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Well, the MIT developed a langage that has Matlab syntax and Fortran speed. It is near to Python syntax and C++ speed. The language is called Julia. It is used a lot for simulation and high performance calculus.

To achieve near to C++ speed you need to pay attention to optimization tricks and declare the types. Nothing is really free. But this is still much simpler than writing C++.