一个日志引发的性能问题
import os
import time
fp = open('test.txt', mode='w')
start_time = time.time()
for _ in range(100000):
fp.write('a')
fp.flush()
os.stat('test.txt')
end_time = time.time()
print(f'Used time: {end_time - start_time}')
Used time: 37.93260073661804
import os
import time
fp = open('test.txt', mode='w')
start_time = time.time()
for _ in range(100000):
fp.write('a')
fp.flush()
end_time = time.time()
print(f'Used time: {end_time - start_time}')
Used time: 0.10350179672241211
import os
import time
fp = open('test.txt', mode='w')
start_time = time.time()
for _ in range(100000):
os.stat('test.txt')
end_time = time.time()
print(f'Used time: {end_time - start_time}')
Used time: 0.09731388092041016
>>> stat test.txt
文件："test.txt"
大小：100000 块：200 IO 块：32768 普通文件
设备：2ah/42d Inode：7937523 硬链接：1
权限：(0644/-rw-r--r--) Uid：( 3011/ hanwei) Gid：( 3999/ alg_dev)
最近访问：2021-12-23 14:58:27.833851083 +0800
最近更改：2021-12-23 14:59:40.443886325 +0800
最近改动：2021-12-23 14:59:40.443886325 +0800
创建时间：-
