x86-64+AVX2 assembly language
to compile this code; run
gcc -mavx2 -c fizzbuzz.S
ld -o fizzbuzz fizzbuzz.o
to run this code, you will need to pipe it to cat
./fixxbuzz | cat
use taskset to force the programs onto particular CPUs:
taskset 1 ./fizzbuzz | taskset 2 pv > /dev/null