slow Python 3.0 write performance?
Mike Driscoll
kyosohma at gmail.com
Fri Dec 5 14:27:19 EST 2008
On Dec 5, 12:54 pm, Istvan Albert <istvan.alb... at gmail.com> wrote:
> Could someone run the code below on both Python 2.5 and 3.0
>
> For me (on Windows) it runs over 7 times slower with Python 3.0
>
> import time
>
> lo, hi, step = 10**5, 10**6, 10**5
>
> # writes increasingly more lines to a file
> for N in range(lo, hi, step):
> fp = open('foodata.txt', 'wt')
> start = time.time()
> for i in range( N ):
> fp.write( '%s\n' % i)
> fp.close()
> stop = time.time()
> print ( "%s\t%s" % (N, stop-start) )
Ran on Windows XP virtual machine:
3.0 output:
100000 0.889999866486
200000 1.79699993134
300000 2.875
400000 3.73399996758
500000 4.71899986267
600000 5.59400010109
700000 7.04699993134
800000 7.31299996376
900000 8.375
2.5.2 output:
100000 0.156000137329
200000 0.296999931335
300000 0.640000104904
400000 0.640000104904
500000 0.78200006485
600000 0.952999830246
700000 1.13999986649
800000 1.25
900000 1.42199993134
Slowness in this exercise is confirmed on Windows XP.
Mike
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