David M. Beazley <[EMAIL PROTECTED]> added the comment:

Tried this using projects/python/branches/release30-maint and using the 
patch that was just attached.   With a 66MB input file, here are the 
results of this code fragment:

for line in open("BIGFILE):
    pass

Python 2.6: 0.67s
Python 3.0: 32.687s     (48 times slower)

This is running on a MacBook with a warm disk cache. For what it's 
worth, I didn't see any improvement with that patch.

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Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue4561>
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