human
Complete this python program:
def benchmark(scale=1):
assistant
#Here is the Python code you requested.

    """Benchmark and return information regarding the relative performance of a
    protocol which does not use the buffering mixin and a protocol which
    does.
    @type scale: C{int}
    @param scale: A multipler to the amount of work to perform
    @return: A Deferred which will fire with a dictionary mapping each of
    the two unicode strings C{u\buffered\} and C{u\unbuffered\} to
    dictionaries describing the performance of a protocol of each type.
    These value dictionaries will map the unicode strings C{u\connected\}
    and C{u\disconnected\} to the times at which each of those events
    occurred and C{u\duration\} two the difference between these two values.
    """
    overallResult = {}
    byteCount = 1024
    bufferedDeferred = _benchmarkBuffered((byteCount * scale))
    def didBuffered(bufferedResult):
        overallResult[u'buffered'] = bufferedResult
        unbufferedDeferred = _benchmarkUnbuffered((byteCount * scale))
        def didUnbuffered(unbufferedResult):
            overallResult[u'unbuffered'] = unbufferedResult
            return overallResult
        unbufferedDeferred.addCallback(didUnbuffered)
        return unbufferedDeferred
    bufferedDeferred.addCallback(didBuffered)
    return bufferedDeferred