Expose HyperLogLogPlusPlus#add(byte[], int offset, int size)

[16pierre]

Some callers can have binary representations that look like: byte[], int offset, int size.

The only current access pattern for bytes is HyperLogLogPlusPlus#add(byte[] bytes), which forces such callers to copy bytes. This copy can be avoided because HashFunction exposes HashFunction#hashBytes(byte[] input, int off, int len).