private long longHashCode(Bytes bytes) {
long h = 0;
int i = 0;
long limit = bytes.limit(); // clustering.
for (; i < limit - 7; i += 8) h = 10191 * h + bytes.readLong(i);
// for (; i < bytes.limit() - 3; i += 2)
// h = 10191 * h + bytes.readInt(i);
for (; i < limit; i++) h = 57 * h + bytes.readByte(i);
h ^= (h >>> 31) + (h << 31);
h += (h >>> 21) + (h >>> 11);
return h;
}
