def METHOD_NAME(lexer, s):
    """Show that a given string is tokenized quickly."""
    start = time.time()
    tokens = list(lexer.get_tokens_unprocessed(s))
    end = time.time()
    # Isn't 10 seconds kind of a long time?  Yes, but we don't want false
    # positives when the tests are starved for CPU time.
    if end-start > 10:
        pytest.fail('tokenization took too long')
    return tokens