Explore a fast and efficient approach to UTF-8 conversion using C++, Deterministic Finite Automata (DFAs), and SSE intrinsics in this conference talk from C++Now 2018. Dive into the intricacies of UTF-8, UTF-16, and UTF-32 encodings, understanding code units and code points. Learn how to construct a DFA for optimal UTF-8 conversion, implement the algorithm using simple lookup tables and C++ code, and leverage SSE intrinsics for enhanced performance. Compare this method with common implementations on Windows and Linux, demonstrating significant speed improvements. Gain insights into handling overlong and invalid byte sequences, optimizing ASCII conversion, and utilizing static member functions and data structures for efficient processing.