[pypy-dev] New speed.pypy.org version

Maciej Fijalkowski fijall at gmail.com
Fri Jun 25 19:28:21 CEST 2010


PyPy branches mostly (did this improve or not really kind of question)

On Fri, Jun 25, 2010 at 11:23 AM, Miquel Torres <tobami at googlemail.com> wrote:
> There is no problem in running tests for branches. What other branches or
> interpreters would you for example run?
>
>
> 2010/6/25 Maciej Fijalkowski <fijall at gmail.com>
>>
>> On Fri, Jun 25, 2010 at 5:08 AM, Miquel Torres <tobami at googlemail.com>
>> wrote:
>> > Hi all!,
>> >
>> > I want to announce a new version of the benchmarks site speed.pypy.org.
>> >
>> > After about 6 months, it finally shows the vision I had for such a
>> > website:
>> > usefull for pypy developers but also for the general public following
>> > pypy's
>> > or even other python implementation's development. On to the changes.
>> >
>> > There are now three views: "Changes", "Timeline" and "Comparison":
>> >
>> > The Overview was renamed to Changes, and its inline plot bars got
>> > removed
>> > because you can get the exact same plot in the Comparison view now (and
>> > then
>> > some).
>> >
>> > The Timeline got selectable baseline and "humanized" date labels for the
>> > x
>> > axis.
>> >
>> > The new Comparison view allows, well, comparing of "competing"
>> > interpreters,
>> > which will also be of interest to the wider Python community (specially
>> > if
>> > we can add unladen, ironpython and JPython results).
>> >
>> >
>> > Two examples of interesting comparisons are:
>> >
>> > - relative bars
>> > (http://speed.pypy.org/comparison/?bas=2%2B35&chart=relative+bars): here
>> > we
>> > see that the jit is faster than psyco in all cases except spambayes and
>> > slowspitfire, were the jit cannot make up for pypy-c's abismal
>> > performance.
>> > Interestingly, in the only other case where the jit is slower than
>> > cpython,
>> > the ai benchmark, psyco performs even worse.
>> >
>> > - stacked bars
>> >
>> > horizontal(http://speed.pypy.org/comparison/?hor=true&bas=2%2B35&chart=stacked+bars):
>> > This is not meant to "demonstrate" that overall the jit is over two
>> > times
>> > faster than cpython. It is just another way for a developer to picture
>> > how
>> > long a programme would take to complete if it were composed of 21 such
>> > tasks. You can see that cpython's (the normalization chosen) benchmarks
>> > all
>> > take 1"relative" second. pypy-c needs more or less the same time, some
>> > "tasks" being slower and some faster. Psyco shows an interesting
>> > picture:
>> > From meteor-contest downwards (fortuitously) , all benchmarks are
>> > extremely
>> > "compressed", which means they are speeded up by psyco quite a lot. But
>> > any
>> > further speed up wouldn't make overall time much shorter because the
>> > first
>> > group of benchmarks now takes most of the time to complete. pypy-c-jit
>> > is a
>> > more extreme case of this: If the jit accelerated all "fast" benchmarks
>> > to 0
>> > seconds (infinitely fast), it would only get about twice as fast as now
>> > because ai, slowspitfire, spambayes and twisted_tcp now need half the
>> > entire
>> > execution time. An good demonstration of "you are only as fast as your
>> > slowest part". Of course the aggregate of all benchmarks is not a real
>> > app,
>> > but it is still fun.
>> >
>> > I hope you find the new version useful, and as always any feedback is
>> > welcome.
>> >
>> > Cheers!
>> > Miquel
>> >
>>
>> Wow, I really like it, great job.
>>
>> Can we see how we can use this features for branches?
>>
>> Cheers,
>> fijal
>
>



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