Message 183211 - Python tracker

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Author	christian.heimes
Recipients	asvetlov, benjamin.peterson, christian.heimes, jcea, jcon, phihag, pitrou, rhettinger, serhiy.storchaka, vstinner
Date	2013-02-28.11:06:07
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1362049568.14.0.976934882578.issue16465@psf.upfronthosting.co.za>
In-reply-to

Content
The patch gives a measurable speedup (./python is a patched 3.3.0+). IMO we should apply it. It's small and I can see no harm, too. $ for PY in python2.7 python3.2 python3.3 ./python; do cmd="$PY -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'"; echo $cmd; eval $cmd; done python2.7 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}' 10000000 loops, best of 3: 0.162 usec per loop python3.2 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}' 10000000 loops, best of 3: 0.142 usec per loop python3.3 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}' 10000000 loops, best of 3: 0.669 usec per loop ./python -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}' 10000000 loops, best of 3: 0.381 usec per loop $ for PY in python2.7 python3.2 python3.3 ./python; do cmd="$PY -R -m timeit -n 10000000 'int(\"1\", base=16)'"; echo $cmd; eval $cmd; done python2.7 -R -m timeit -n 10000000 'int("1", base=16)' 10000000 loops, best of 3: 0.268 usec per loop python3.2 -R -m timeit -n 10000000 'int("1", base=16)' 10000000 loops, best of 3: 0.302 usec per loop python3.3 -R -m timeit -n 10000000 'int("1", base=16)' 10000000 loops, best of 3: 0.477 usec per loop ./python -R -m timeit -n 10000000 'int("1", base=16)' 10000000 loops, best of 3: 0.356 usec per loop

The patch gives a measurable speedup (./python is a patched 3.3.0+). IMO we should apply it. It's small and I can see no harm, too.

$ for PY in python2.7 python3.2 python3.3 ./python; do cmd="$PY -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'"; echo $cmd; eval $cmd; done
python2.7 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'
10000000 loops, best of 3: 0.162 usec per loop
python3.2 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'
10000000 loops, best of 3: 0.142 usec per loop
python3.3 -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'
10000000 loops, best of 3: 0.669 usec per loop
./python -R -m timeit -n 10000000 '{};{};{};{};{};{};{};{};{};{}'
10000000 loops, best of 3: 0.381 usec per loop

$ for PY in python2.7 python3.2 python3.3 ./python; do cmd="$PY -R -m timeit -n 10000000 'int(\"1\", base=16)'"; echo $cmd; eval $cmd; done
python2.7 -R -m timeit -n 10000000 'int("1", base=16)'
10000000 loops, best of 3: 0.268 usec per loop
python3.2 -R -m timeit -n 10000000 'int("1", base=16)'
10000000 loops, best of 3: 0.302 usec per loop
python3.3 -R -m timeit -n 10000000 'int("1", base=16)'
10000000 loops, best of 3: 0.477 usec per loop
./python -R -m timeit -n 10000000 'int("1", base=16)'
10000000 loops, best of 3: 0.356 usec per loop

History
Date	User	Action	Args
2013-02-28 11:06:08	christian.heimes	set	recipients: + christian.heimes, rhettinger, jcea, pitrou, vstinner, benjamin.peterson, phihag, asvetlov, jcon, serhiy.storchaka
2013-02-28 11:06:08	christian.heimes	set	messageid: <1362049568.14.0.976934882578.issue16465@psf.upfronthosting.co.za>
2013-02-28 11:06:08	christian.heimes	link	issue16465 messages
2013-02-28 11:06:07	christian.heimes	create