[pypy-dev] new -O option

Jean-Paul Calderone exarkun at divmod.com
Mon Aug 4 13:29:33 CEST 2008

On Mon, 4 Aug 2008 09:03:01 +0200, holger krekel <holger at merlinux.eu> wrote:
>Hi Armin,
>On Sun, Aug 03, 2008 at 15:13 +0200, Armin Rigo wrote:
>> Hi all,
>> I'm going to merge the "opt-option" branch; I'll write a blog post entry
>> when it's done.  It removes the "--faassen" and "--allopts" options to
>> translate.py and adds instead the "--opt=#" option, which can also be
>> spelled "-O#", where "#" is one of 0, 1, size, mem, 2 or 3.  Levels from
>> 0 to 3 are trade-offs between the time+memory it takes to translate, and
>> the efficiency of the produced executable.  Levels "size" and "mem" try
>> (or should try in the future) to minimize the executable size and the
>> runtime memory usage, respectively.  The level is a global option of
>> translate.py but it also influences PyPy-specific options in
>> targetpypystandalone.py; for example, a bit arbitrarily, geninterp is
>> disabled with -O0.  The specific config options enabled or disabled by
>> each level can depend on e.g. the selected backend; see the two
>> functions set_opt_level() and set_pypy_opt_level().
>looks good.  i particularly like that a single "-O#" sets
>things nicely both for translation and the target.
>> We have a number of open branches; does it make sense, in an effort to
>> reduce confusion, to apply this change to some of them too?
>Maybe, yes.  Reminds me: I'd really like to see better tool
>support for working with branches. eazysvn from Marius Gedminas
>might help a bit (haven't tried) but i am rather thinking of
>something that helps me efficiently managing
>e.g. my "codespeak.net/svn/pypy" checkout, including quick
>overviews of active branches, easy merging (without knowing
>numbers) etc.  Some might think "dvcs!" here but it's a while
>until we go there, i think, and i even consider somewhat orthogonal
>to having support for my particular work flow.

Combinator does some of these things.



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