[pypy-issue] [issue1486] Pypy disk IO is slower than python2.6？

[shenlong]

New submission from shenlong <shenlong1996 at gmail.com>:

import os

def main():
    path = "XXX" 
    dir_list=os.listdir(path)
    for i in dir_list:
        f=open(path+i)
        j=0
        for line in f:
            j+=1
        f.close

if __name__=='__main__':
    main()




with python2.6

time python26 -m profile tool3.py 
 
         2644 function calls in 1.898 CPU seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    1.897    1.897 :0(execfile)
        1    0.001    0.001    0.001    0.001 :0(listdir)
     2637    0.040    0.000    0.040    0.000 :0(open)
        1    0.001    0.001    0.001    0.001 :0(setprofile)
        1    0.000    0.000    1.897    1.897 <string>:1(<module>)
        1    0.000    0.000    1.898    1.898 profile:0(execfile('tool3.py'))
        0    0.000             0.000          profile:0(profiler)
        1    0.000    0.000    1.897    1.897 tool3.py:3(<module>)
        1    1.856    1.856    1.897    1.897 tool3.py:5(main)



real    0m1.968s
user    0m1.518s
sys     0m0.449s




with pypy

time pypy -m profile tool3.py      
         5 function calls in 3.809 seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.002    0.002    0.002    0.002 :0(listdir)
        1    0.001    0.001    0.001    0.001 :0(setprofile)
        1    0.001    0.001    3.809    3.809 profile:0(<code object <module>, 
file 'tool3.py', line 3>)
        0    0.000             0.000          profile:0(profiler)
        1    0.001    0.001    3.807    3.807 tool3.py:3(<module>)
        1    3.804    3.804    3.806    3.806 tool3.py:5(main)



real    0m4.111s
user    0m3.477s
sys     0m0.480s

----------
messages: 5721
nosy: pypy-issue, sd87271833
priority: performance bug
status: chatting
title: Pypy disk IO is slower than python2.6？

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PyPy bug tracker <tracker at bugs.pypy.org>
<https://bugs.pypy.org/issue1486>
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