Python 如何高效比对两个文件是否相同

import hashlib

def get_file_hash(filepath, hash_algo=hashlib.md5):

    hash_obj = hash_algo()

    with open(filepath, 'rb') as f:

        for chunk in iter(lambda: f.read(8192), b""):

            hash_obj.update(chunk)

    return hash_obj.hexdigest()

if get_file_hash('file1.txt') == get_file_hash('file2.txt'):

    print("文件内容相同")

else:

    print("文件内容不同")

import filecmp

if filecmp.cmp('file1.txt', 'file2.txt', shallow=False):

    print("文件相同")

else:

    print("文件不同")

def files_equal(file1, file2, block_size=8192):

    with open(file1, 'rb') as f1, open(file2, 'rb') as f2:

        while True:

            b1 = f1.read(block_size)

            b2 = f2.read(block_size)

            if b1 != b2:

                return False

            if not b1:

                break

    return True

import os

def quick_compare(file1, file2):

    stat1 = os.stat(file1)

    stat2 = os.stat(file2)

    if stat1.st_size != stat2.st_size:

        return False  # 大小不同，肯定不一样

    return filecmp.cmp(file1, file2, shallow=False)