Using std::execution policies like par_unseq in C++ can significantly improve performance, particularly in numerical tasks such as matrix or signal processing.
Linking the Intel TBB library with -ltbb is necessary for proper execution of parallel algorithms like std::execution::par.
Important considerations include handling simultaneous writes to variables, exceptions in parallel code, and debugging challenges.
Commonly used STL algorithms that support an execution policy parameter include std::reduce and scan algorithms, offering improved performance in parallel and associative operations.