The most common call in the benchmark is to `getLongestPath<16>`. Passing 16 bits by value is cheaper and easier for the compiler to optimize (i.e., no aliasing

The most common call in the benchmark is to `getLongestPath<16>`. Passing 16 bits by value is cheaper and easier for the compiler to optimize (i.e., no aliasing) than passing by reference. I'd expect graphs with many nodes to behave differently.