[Python-Dev] Python 3 optimizations continued... (original) (raw)

Mark Shannon mark at hotpy.org
Tue Aug 30 10:31:12 CEST 2011

Nick Coghlan wrote:

On Tue, Aug 30, 2011 at 7:14 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:

On Mon, 29 Aug 2011 11:33:14 -0700 stefan brunthaler <s.brunthaler at uci.edu> wrote:

* The optimized dispatch routine has a changed instruction format (word-sized instead of bytecodes) that allows for regular instruction decoding (without the HASARG-check) and inlinind of some objects in the instruction format on 64bit architectures. Having a word-sized "bytecode" format would probably be acceptable in itself, so if you want to submit a patch for that, go ahead. Although any such patch should discuss how it compares with Cesare's work on wpython. Personally, I like CPython fitting into the "simple-and-portable" niche in the Python interpreter space.

CPython has a a large number of micro-optimisations, scattered all of the code base. By removing these and adding large-scale optimisations, like Stephan's, the code base might actually get smaller overall (and thus simpler) and faster. Of course, CPython must remain portable.

[snip]

At a bare minimum, I don't think any significant changes should be made under the "it will be faster" justification until the bulk of the real-world benchmark suite used for speed.pypy.org is available for Python 3. (Wasn't there a GSoC project about that?)

+1

Cheers, Mark.

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