Py 3 slower than Py 2. Towers of Hanoi implementation
Udyant Wig
udyantw at gmail.com
Fri Jun 26 10:07:51 EDT 2009
I implemented this -> http://www.apl.jhu.edu/~hall/lisp/Hanoi.lisp in
both flavors of Python: 2.6.2 and 3.0.1 (CPython)
The code:
#!/usr/bin/env python
def remaining_peg (peg1, peg2):
return (6 - peg1 - peg2)
def hanoi (num_discs, start, end):
if (1 == num_discs):
print "Top of peg {0} to peg {1}".format(start,end) # used print()
for Py 3.0.1
else:
hanoi ((num_discs - 1), start, (remaining_peg (start, end)))
hanoi (1, start, end)
hanoi ((num_discs - 1), (remaining_peg (start, end)), end)
hanoi(20,2,3)
The times: real usr sys
Python 2.6.2 7.994s 3.336s 3.296s
Python 3.0.1 55.302s 38.024s 5.876s
What happened to Python?
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