On 03/07/13 19:16, Amaury Forgeot d'Arc wrote:
2013/7/3 Eleytherios Stamatogiannakis <estama@gmail.com <mailto:estama@gmail.com>>
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. _________________________________________________ pypy-dev mailing list pypy-dev@python.org <mailto:pypy-dev@python.org> http://mail.python.org/__mailman/listinfo/pypy-dev <http://mail.python.org/mailman/listinfo/pypy-dev>
-- Amaury Forgeot d'Arc