[Python-Dev] [ANN] VPython 0.1

Gregory P. Smith greg at krypto.org
Sat Nov 1 22:32:05 CET 2008

On Fri, Oct 24, 2008 at 12:53 AM, J. Sievers <cadr4u at gmail.com> wrote:
> "M.-A. Lemburg" <mal at egenix.com> writes:
> [snip]
>> BTW: I hope you did not use pybench to get profiles of the opcodes.
>> That would most certainly result in good results for pybench, but
>> less good ones for general applications such as Django or Zope/Plone.
> Algorithm used for superinstruction selection:
> 1) idea: LOAD_CONST/LOAD_FAST + some suffix
> 2) potential suffixes:
>   $ grep '..*(..*--..*)$' ceval.vmg | grep 'a1 a2 --' > INSTRUCTIONS
> 3) delete any instruction that I felt wouldn't be particularly frequent
>   from INSTRUCTIONS (e.g. raise_varargs)
> 4) use awk to generate superinstruction definitions
> Not only is this relatively unbiased but also very low effort.
> -jakob

Thanks Jakob.  I'm glad to see that you've done this.  I had been
hoping to see super instructions tried on the python VM for years but
never found the time to do it myself.


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