If you’re writing optimized code, hardly ever would you evaluate one CRC check at a time. You would process them in chunks, as the OP stated, but would just let

If you’re writing optimized code, hardly ever would you evaluate one CRC check at a time. You would process them in chunks, as the OP stated, but would just let a compiler do the auto-vectorization. This is even more true in the case of CRC, where there’s clearly almost always one branch that wins: this is perfect for branch prediction, which would mean the whole “if eq” condition is preemptively skipped.