Re: 2to3 used in the Shootout
On Dec 29 2008, 8:36 am, prueba...@latinmail.com wrote:
> On Dec 23, 5:21 pm, Isaac Gouy wrote:
>
> > On Dec 23, 11:51 am, bearophileh...@lycos.com wrote:
>
> > > They have translated the Python benchmarks of theShootoutsite from
> > > Py2 to Py3 using 2to3:
>
> > >http://shootout.alioth.debian.org/u32/benchmark.php?test=all〈=pyt...
>
> > So please re-write those programs to remove problems created by
> > automatic translation and better take advantage of Python 3
> > functionality...
>
> >http://shootout.alioth.debian.org/u32/faq.php#play
>
> > > It shows some "performance bugs" of Python3 itself (especially
> > > regarding the binary-trees benchmark, that was unexpected by me), and
> > > two points where 2to3 may be improved, for example after the
> > > translation this gives error:
> > > table=string.maketrans('ACBDGHK\nMNSRUTWVYacbdghkmnsrutwvy',
> > > 'TGVHCDM
> > > \nKNSYAAWBRTGVHCDMKNSYAAWBR')):
>
> > > Gives:
> > > TypeError: maketrans arguments must be bytes objects
>
> > > Bye,
> > > bearophile
>
> BTW I am not sure how to submit this or if this is actually valid to
> do, but I have a faster version for the pidigits program that uses
> basically the same algorithm but removes function calls and unused
> terms of the formula.
>
>
> import time
>
> def pi_digits(n, width):
> out = []
> wrt = out.append
> aq = 1
> ar = 0
> at = 1
> k = 0
> f = 1
> g = 2
> i = 0
> while i < n:
> y = (aq*3+ar)//at
> while y != ((aq*4+ar)//at):
> k += 1
> f += 2
> g += 4
> ar = aq*g+ar*f
> aq = aq*k
> at = at*f
> y = (aq*3+ar)//at
> aq = 10*aq
> ar = 10*ar-10*y*at
> i += 1
> wrt(str(y))
> if not i%width:
> wrt('\t:%d\n'%i)
> wrt(' '*(width-i%width))
> wrt('\t:%d\n'%i)
> return ''.join(out)
>
> def main():
> begin = time.time()
> n = 1000
> width = 70
> print pi_digits(n,width)
> print 'Total Time:', time.time()-begin
>
> main()
>
>
http://shootout.alioth.debian.org/u32q/faq.php#play
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Re: 2to3 used in the Shootout
On Dec 23, 5:21 pm, Isaac Gouy wrote:
> On Dec 23, 11:51 am, bearophileh...@lycos.com wrote:
>
> > They have translated the Python benchmarks of the Shootout site from
> > Py2 to Py3 using 2to3:
>
> >http://shootout.alioth.debian.org/u32/benchmark.php?test=all〈=pyt...
>
> So please re-write those programs to remove problems created by
> automatic translation and better take advantage of Python 3
> functionality...
>
> http://shootout.alioth.debian.org/u32/faq.php#play
>
> > It shows some "performance bugs" of Python3 itself (especially
> > regarding the binary-trees benchmark, that was unexpected by me), and
> > two points where 2to3 may be improved, for example after the
> > translation this gives error:
> > table=string.maketrans('ACBDGHK\nMNSRUTWVYacbdghkmnsrutwvy',
> > 'TGVHCDM
> > \nKNSYAAWBRTGVHCDMKNSYAAWBR')):
>
> > Gives:
> > TypeError: maketrans arguments must be bytes objects
>
> > Bye,
> > bearophile
>
>
BTW I am not sure how to submit this or if this is actually valid to
do, but I have a faster version for the pidigits program that uses
basically the same algorithm but removes function calls and unused
terms of the formula.
import time
def pi_digits(n, width):
out = []
wrt = out.append
aq = 1
ar = 0
at = 1
k = 0
f = 1
g = 2
i = 0
while i < n:
y = (aq*3+ar)//at
while y != ((aq*4+ar)//at):
k += 1
f += 2
g += 4
ar = aq*g+ar*f
aq = aq*k
at = at*f
y = (aq*3+ar)//at
aq = 10*aq
ar = 10*ar-10*y*at
i += 1
wrt(str(y))
if not i%width:
wrt('\t:%d\n'%i)
wrt(' '*(width-i%width))
wrt('\t:%d\n'%i)
return ''.join(out)
def main():
begin = time.time()
n = 1000
width = 70
print pi_digits(n,width)
print 'Total Time:', time.time()-begin
main()
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Re: 2to3 used in the Shootout
On Dec 23, 11:51 am, bearophileh...@lycos.com wrote:
> They have translated the Python benchmarks of the Shootout site from
> Py2 to Py3 using 2to3:
>
> http://shootout.alioth.debian.org/u32/benchmark.php?test=all〈=pyt...
So please re-write those programs to remove problems created by
automatic translation and better take advantage of Python 3
functionality...
http://shootout.alioth.debian.org/u32/faq.php#play
> It shows some "performance bugs" of Python3 itself (especially
> regarding the binary-trees benchmark, that was unexpected by me), and
> two points where 2to3 may be improved, for example after the
> translation this gives error:
> table=string.maketrans('ACBDGHK\nMNSRUTWVYacbdghkmnsrutwvy',
> 'TGVHCDM
> \nKNSYAAWBRTGVHCDMKNSYAAWBR')):
>
> Gives:
> TypeError: maketrans arguments must be bytes objects
>
> Bye,
> bearophile
--
http://mail.python.org/mailman/listinfo/python-list
Re: 2to3 used in the Shootout
bearophileh...@lycos.com wrote:
They have translated the Python benchmarks of the Shootout site from
Py2 to Py3 using 2to3:
http://shootout.alioth.debian.org/u32/benchmark.php?test=all&lang=python3
It shows some "performance bugs" of Python3 itself (especially
regarding the binary-trees benchmark, that was unexpected by me), and
two points where 2to3 may be improved, for example after the
translation this gives error:
table=string.maketrans('ACBDGHK\nMNSRUTWVYacbdghkmnsrutwvy',
'TGVHCDM
\nKNSYAAWBRTGVHCDMKNSYAAWBR')):
Gives:
TypeError: maketrans arguments must be bytes objects
Perhaps you could file a tracker item.
--
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2to3 used in the Shootout
They have translated the Python benchmarks of the Shootout site from
Py2 to Py3 using 2to3:
http://shootout.alioth.debian.org/u32/benchmark.php?test=all&lang=python3
It shows some "performance bugs" of Python3 itself (especially
regarding the binary-trees benchmark, that was unexpected by me), and
two points where 2to3 may be improved, for example after the
translation this gives error:
table=string.maketrans('ACBDGHK\nMNSRUTWVYacbdghkmnsrutwvy',
'TGVHCDM
\nKNSYAAWBRTGVHCDMKNSYAAWBR')):
Gives:
TypeError: maketrans arguments must be bytes objects
Bye,
bearophile
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