def METHOD_NAME(schema, records, runs=1):
    times = []
    schema = parse_schema(schema)
    for _ in range(runs):
        for record in records:
            iostream = BytesIO()
            start = time.time()
            schemaless_writer(iostream, schema, record)
            end = time.time()
            times.append(end - start)
    print(f'... {runs} runs averaged {sum(times) / runs} seconds')
    return iostream