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import math
with open('test.txt','w') as f:
        f.write('\n'.join(list(str(math.factorial(99999)))))
import timeit
a1=timeit.timeit("print(open('test.txt').read())", number = 1)
a2=timeit.timeit("stdout.write(open('test.txt').read())",setup='from sys import stdout', number = 1)
a3=timeit.timeit("os.write(os.open('test2.txt', os.O_WRONLY), open('test.txt', 'r').read().encode())",setup='import os', number = 1)
print('\n',a1,a2,a3,sep='\n')
 
 
 
 
5.853710182966125
5.801569472562138
0.0077020472176236865
>>>

import sys
import random
 
ls = [random.random() for i in range(200_000)]
 
def func1():
    print(*ls, sep='\n')
 
def func2():
    for i in ls:
        sys.stdout.write(str(i))
        sys.stdout.write('\n')
 
def func3():
    for i in ls:
        sys.stdout.write(str(i))
        sys.stdout.write('\n')
        sys.stdout.flush()
 
import timeit
a1 = timeit.timeit('func1()', setup='from __main__ import func1', number=1)
a2 = timeit.timeit('func2()', setup='from __main__ import func2', number=1)
a3 = timeit.timeit('func3()', setup='from __main__ import func3', number=1)
print('\n',a1,a2,a3,sep='\n')

def func4():
    sys.stdout.write('\n'.join(map(str, ls)))

# reopen stdout file descriptor with write mode
# and 0 as the buffer size (unbuffered)
unbuffered = io.TextIOWrapper(open(sys.stdout.fileno(), 'wb', 0), write_through=True)
 
def func5():
    unbuffered.write('\n'.join(map(str, ls)))

os.write(1, "".join(results))

open(sys.stdout.fileno(), 'wb')

a3=timeit.timeit("os.write(1, open('test.txt', 'r').read().encode())",setup='import os', number = 1)
 
 
Traceback (most recent call last):
  File "C:\censored\dfgdfg.py", line 7, in <module>
    a3=timeit.timeit("os.write(1, open('test.txt', 'r').read().encode())",setup='import os', number = 1)
  File "C:\censored\timeit.py", line 233, in timeit
    return Timer(stmt, setup, timer, globals).timeit(number)
  File "C:\censored\timeit.py", line 178, in timeit
    timing = self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
OSError: [Errno 9] Bad file descriptor
>>>

def func6():
    fn = sys.stdout.fileno()
    for i in ls:
        os.write(fn, bytes(str(i), encoding='utf8'))
        os.write(fn, b'\n')

8.122584128265231
8.11423634089563
0.2931352336421327

arr = list([str(i) for i in range(100000, 300000)])
 
print('\n'.join(arr))

sys.stdout.write('\n'.join(map(str, range(100000, 200000))))

arr = list([str(i) for i in range(100000, 300000)])
 
print('\n'.join(arr))

import os
with open('test2.txt','w') as f:
    f.write('\n'.join([str(i) for i in range(100000, 300000)]))
def f6():
    with open('test2.txt','r') as f:
        os.write(1, f.read().encode())
f6()

def f6():
    with open('test2.txt','r') as f:
        for i in f.read():
            os.write(1, i.encode())

import os,timeit,sys
with open('test.txt','w') as f:
    f.write('\n'.join([str(i) for i in range(1, 4000)]))
def fos():
    with open('test.txt','r') as f:
        os.write(1, f.read().encode())
def fstd():
    with open('test.txt','r') as f:
        print(f.read())
def fsys():
    with open('test.txt','r') as f:
        sys.stdout.write(f.read())
a1 = timeit.timeit('fos()', setup='from fast import fos', number=100)
a2 = timeit.timeit('fstd()', setup='from fast import fstd', number=100)
a3 = timeit.timeit('fsys()', setup='from fast import fsys', number=100)
print('\n',a1,'\n',a2,'\n',a3)
 
 7.456094529996452
 7.459921755359111
 7.460034028335134