...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
The ideal way to optimize the constants would be to have a carefully-tuned
lookup-table instead of the get_max_count
function, but
4 tuning variables is simpler, get_max_count
enforces
worst-case performance minimization rules, and such a lookup table
would be difficult to optimize for cross-platform performance.
Alternatively, get_max_count
could be used to generate
a static lookup table. This hasn't been done due to concerns about
cross-platform compatibility and flexibility.