In this benchmark, we explore the importance of keeping data within the CPU cache to avoid expensive retrieval from RAM. By simply ensuring linear data access and accessing by blocks that fit in L1 and L2, we can achieve massive performance gains without changing the underlying algorithm.
const T& binds to everything but it is dangerous
Templates complilation generate code at compile time, before the program is executed (compile-time vs run-time). Every different instantiation produces a separate function at compile time. This way we avoid writing duplication of the code. Also, we can avoid mistakes even on compilation time when we static assert them. As the name suggests, this checks takes place statically - on compilation. Like this, we avoid mistakes that might appear during runtime, when we should not instantiate a function of a specific type. Static-asserts was already introduced in C++11, though the we have some important imporvements in C++17 like CTAD and concepts or requires in C++20. ...