On 03/07/13 19:16, Amaury Forgeot d'Arc wrote:
2013/7/3 Eleytherios Stamatogiannakis <[email protected]
<mailto:[email protected]>>
Hello,
We also found a case where PyPy is 2x slower than CPython. The
following code:
This is because of I/O.
If I replace the file with a custom class which has an empty write() method,
pypy is twice faster than CPython.
Ah, i guess that the I/O isn't so much optimized, as the other things
are, on PyPy?
Thanks for looking into this test case.
l.
Note: with pypy, io.open() is even slower :-(
<<<<
import cPickle
fileIter=open("pypytesting", "w+b")
mylist = ["qwerty"] * 100
for i in xrange(1000000):
cPickle.dump(mylist, fileIter,1)
>>>>
Runs at:
CPython 2.7.3: 13.114 sec
PyPy nightly: 29.239 sec
[Warning: it'll produce a file (pypytesting) that is 205 MB in size]
Kind regards,
lefteris.
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Amaury Forgeot d'Arc
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