Background logging can reduce CPU usage

[joo]

sleep 50 milliseconds when the queue is empty, will reduce CPU usage by 3%.

class Logger:
    LOGGERS = []

    def __init__(self):
        self.run = True
        self.loggers = {
            logger: logging.getLogger(logger) for logger in self.LOGGERS
        }

    def __call__(self, queue) -> None:
        signal_func(SIGINT, self.stop)
        signal_func(SIGTERM, self.stop)

        while self.run:
            try:
                record: LogRecord = queue.get_nowait()
            except Empty:
                time.sleep(0.05) #### can reduce CPU usage
                continue
            logger = self.loggers.get(record.name)
            logger.handle(record)

[ahopkins]

I thought we added something like that 🤔

If not, can you add a PR?

[zhu]

I think change queue.get_nowait() to queue.get(timeout=0.05) is better.