There was 2 unnecessary lines of code in a core method used for DataBits
that repeatedly calculated a static value.
We now just precalculate that in the constructor and reuse the value instead.
This is a micro optimization, but this is some of the hottest code in the server so
it should provide some minor gains as well as improve inlining.
Additionally, to further help inlining, mark the DataBits methods as final.
Aikar