2013/7/3 Eleytherios Stamatogiannakis <[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.
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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