def delta(self):
        if self.start_time and self.end_time:
            return self.end_time - self.start_time
        return None
Get the current time in microseconds since epoch.
dataset/ETHPy150Open mozilla/kitsune/kitsune/search/models.py/Record.delta--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/logservice/logservice_stub.py/RequestLogWriter.get_time_now