小编Eug*_*lev的帖子

在调查线程时我发现了令人惊讶的python行为为什么在C++中读取stdin的行比Python要慢得多？.

如果我从该线程运行简单的python代码

#!/usr/bin/env python
from __future__ import print_function
import time
import sys


count = 0
start_time = time.time()

for line in sys.stdin:
    count += 1

delta_sec = time.time() - start_time
if delta_sec >= 0:
    lines_per_sec = int(round(count/delta_sec))
    print("Read {0:n} lines in {1:.2f} seconds. LPS: {2:n}".format(count, delta_sec, lines_per_sec))

它的工作速度为11.5M LPS,当我将整个脚本分解为单个功能时

#!/usr/bin/env python
from __future__ import print_function
import time
import sys


def test(input):
    count = 0
    start_time = time.time()

    for line in input:
        count += 1

    delta_sec = time.time() - …