我有一个问题,我是python异步世界的新手,我编写了一些代码来测试asyncio
的功能,我创建了10个随机内容的文件,名为file1.txt, file2.txt, ..., file10.txt
这是我的代码:
import asyncio
import aiofiles
import time
async def reader(pack, address):
async with aiofiles.open(address) as file:
pack.append(await file.read())
async def main():
content = []
await asyncio.gather(*(reader(content, f'./file{_+1}.txt') for _ in range(10)))
return content
def core():
content = []
for number in range(10):
with open(f'./file{number+1}.txt') as file:
content.append(file.read())
return content
if __name__ == '__main__':
# Asynchronous
s = time.perf_counter()
content = asyncio.run(main())
e = time.perf_counter()
print(f'Take {e - s: .3f}')
# Synchronous
s = time.perf_counter()
content = core()
e = time.perf_counter()
print(f'Take {e - s: .3f}')
得到了这个结果:
Asynchronous: Take 0.011
Synchronous: Take 0.001
为什么异步代码比同步代码耗时更长? 我哪里做错了
我在aiofiles的GitHub上发布了一期#110,aiofiles的作者回答说:
我希望它对任何有同样问题的人都有帮助
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