presto-orc/src/main/java/io/prestosql/orc/OrcOutputBuffer.java/OrcOutputBuffer/writeZero
class OrcOutputBuffer:    @Override
    public void writeZero(int length)
    {
        checkArgument(length >= 0, "length must be 0 or greater than 0.");

        while (length > 0) {
            int batch = ensureBatchSize(length);
            Arrays.fill(buffer, bufferPosition, bufferPosition + batch, (byte) 0);
            bufferPosition += batch;
            length -= batch;
        }
    }