[pypy-dev] benchmarking input

holger krekel holger at merlinux.eu
Sat Oct 3 00:15:44 CEST 2009

On Fri, Oct 02, 2009 at 18:49 -0300, Leonardo Santagada wrote:
> On Oct 2, 2009, at 5:20 PM, Stefan Behnel wrote:
> > Anders Hammarquist wrote:
> >> Anyway, what I was thinking about, and need input on, is how to get
> >> at the interpreters to run the benchmark.
> > [...]
> >
> > I wonder, would it be possible to add Cython to the benchmark loop?  
> > I would
> > love to see it compared to PyPy, simply because both projects aim to
> > compile Python code to C code (amongst other things, obviously).
> >
> > I know that Cython can't currently compete with PyPy in terms of  
> > feature
> > completeness - it clearly lacks some very important features of the  
> > Python
> > language, so it won't be able to run all benchmarks for a while, and  
> > the
> > comparison would easily show where the black spots are that need  
> > fixing.
> I think you did some really interesting experiments but the projects  
> don't aim at the same thing at all. PyPy python interpreter is not  
> compiling python code to C it is just interpreting it and using a jit  
> to dynamically compile code (and this is directly to machine code).  
> PyPy python interpreter is meant to be a fully compatible python  
> interpreter and it doesn't depend on no CPython code (like cython does).

I am sure Stefan is fully aware of what PyPy is. 

> I only think it is interesting to compare pypy to other python  
> interpreters, anything that fully suports the python language. I do  
> find cython cool, but as it doesn't try to be a python interpreter  
> there would be no point in doing that.
> What I would like to see is comparisons against python 2.5-7, 3.1,  
> unladen swallow, psyco 2.0 and ironpython.

sure, and Jython.  

I don't see harm in adding Cython for the benchmarks
it understands and if it's all easy enough.  But let's first get
started to automatically benchmark pypy trunk/selected branches 
over the revisions and compare it to one or multiple
CPython versions. 


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