cfunction
src/core/corelib.c on line 732, 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.