加速用Pyinstaller创建的.exe文件

Question

我把我的程序（用Python 3.6.1写的，之前用Python 3.5.3转换过）从.py文件转换成了.exe文件，使用的是Pyinstaller。不过，它的加载速度慢得惊人（大约需要16秒，而在IDLE中运行时只需不到1秒），即使我已经优化了我认为的问题（导入了很多模块，所以我把代码改成只导入必要的模块部分）。这样在IDLE中运行时速度快了很多，但当我把它做成.exe文件后，速度完全没有变化（而且我确认我使用的是正确的.py文件）。看起来Pyinstaller只是把你系统上安装的所有模块都打包进了.exe，而不是只打包那些实际使用的小部分（当使用--onefile时）。我该如何确保Pyinstaller只安装必要的模块部分，或者其他方法来加快速度，同时仍然使用--onefile把它打包成一个.exe文件呢？

完整代码：

from os import path, remove
from time import sleep
from sys import exit
from getpass import getuser
from mmap import mmap, ACCESS_READ


my_file = "Text To Speech.mp3"
username = getuser()
no_choices = ["no", "nah", "nay", "course not", "don't", "dont", "not"]
yes_choices = ["yes", "yeah", "course", "ye", "yea", "yh", "do"]


def check_and_remove_file():

    active = mixer.get_init()
    if active != None:
        mixer.music.stop()
        mixer.quit()
        quit()
    if path.isfile(my_file):
        remove(my_file)


def get_pause_duration(audio_length, maximum_duration=15):

    default_pause, correction = divmod(audio_length, 12)
    return min(default_pause + bool(correction), maximum_duration)


def exiting():

    check_and_remove_file()
    print("\nGoodbye!")
    exit()


def input_for_tts(message):

    try:

        tts = gTTS(text = input(message))
        tts.save('Text To Speech.mp3')
        with open(my_file) as f:
            m = mmap(f.fileno(), 0, access=ACCESS_READ)
        audio = MP3(my_file)
        audio_length = audio.info.length
        try:
            mixer.init()
        except error:
            print("\nSorry, no audio device was detected. The code cannot complete.")
            m.close()
            exiting()   
        mixer.music.load(m)
        mixer.music.play()
        sleep(audio_length + get_pause_duration(audio_length))
        m.close()
        check_and_remove_file()

    except KeyboardInterrupt:

        exiting()


from pygame import mixer, quit, error
from gtts import gTTS
from mutagen.mp3 import MP3


check_and_remove_file()


input_for_tts("Hello there " + username + ". This program is\nused to output the user's input as speech.\nPlease input something for the program to say: ")


while True:

    try:

        answer = input("\nDo you want to repeat? ").strip().lower()
        if answer in ["n", no_choices] or any(x in answer for x in no_choices):
            exiting()
        elif answer in ["y", yes_choices] or any(x in answer for x in yes_choices):
            input_for_tts("\nPlease input something for the program to say: ")
        else:
            print("\nSorry, I didn't understand that. Please try again with yes or no.")

    except KeyboardInterrupt:

        exiting()

加速用Pyinstaller创建的.exe文件

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