Re: [Jython-dev] skeleton benchmarks

[john c. <joh...@ya...>]

Cool, I will provide supporting code as well.


--- Finn Bock <bc...@wo...> wrote:
> [John Coppola]
> 
> >Was the results of this experiment uninteresting?
> No
> >comments?  There seemed to be a lot of enthusiasm
> at
> >one point but no longer.  Hmmm... what are you
> fellas
> >up to?
> 
> I'm reviewing a book, implementing the _weakref
> module and fixing some
> random jython bugs. Thanks for asking <wink>.
> 
> Your finding of a 8x speedup matches my own
> experience when I
> implemented cPickle and cStringIO. Hardening a
> non-trivial python module
> into a java class can typically give 5x to 9x faster
> code. 
> 
> The fact that cPickle.java looks so much faster then
> pickle.py is due to
> the extremely low performing (on jython) way
> pickle.py reads strings
> from the pickle. Each string read from a file cause
> the compilation,
> creation and loading of a new java class.
> cPickle.java avoids this by
> reaching deep into the internal jython
> implementation to reuse the
> string parsing from the parser.
> 
> I'll look closer at your example over the weekend.
> 
> regards,
> finn
> 
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>
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