cfunction
src/core/corelib.c on line 725 , column 1
(memcmp a b &opt len offset-a offset-b )
Compare memory. Takes two byte sequences `a` and `b` , and return 0
if they have identical contents , a negative integer if a is less
than b , and a positive integer if a is greater than b. Optionally
take a length and offsets to compare slices of the bytes sequences.