import hashlib


def compute_md5(file_name, chunk_size=65536):
    """
    Compute MD5 of the file.

    Parameters:
        file_name (str): file name
        chunk_size (int, optional): chunk size for reading large files
    """

    md5 = hashlib.md5()
    with open(file_name, "rb") as fin:
        chunk = fin.read(chunk_size)
        while chunk:
            md5.update(chunk)
            chunk = fin.read(chunk_size)
    return md5.hexdigest()