Python语音识别速度减慢

Question

我开发了一个新程序来与我的聊天机器人交谈。它工作得很好，但有一个我似乎无法弄清楚的奇怪问题。每次重复该过程（控制台输出监听并进行语音识别）时，它都会变慢。第一次走的很快，第二次走慢，第三走慢，然后它就太慢而无法响应。请帮我弄清楚导致这种情况的语法。

import speech_recognition as sr

r = sr.Recognizer()

with sr.Microphone() as source:
    while True:
        print("say something")
        audio = r.listen(source)
        try:
            print("Text:"+r.recognize_google(audio, language = 'en-us', show_all=False));
        except sr.UnknownValueError:
            print("Google Speech Recognition could not understand audio")
        except sr.RequestError as e:
            print("Could not request results from Google Speech Recognition service; {0}".format(e))