til::equals:
At the time of writing wmemcmp() is not an intrinsic for MSVC,
but the STL uses it to implement wide string comparisons.
This produces 3x the assembly _per_ comparison and increases
runtime by 2-3x for strings of medium length (16 characters)
and 5x or more for long strings (128 characters or more).
See: https://github.com/microsoft/STL/issues/2289
Additionally a number of case insensitive, locale unaware
helpers for prefix/suffix comparisons are introduced.
