[Python-Dev] A wordcode-based Python (original) (raw)

Cesare Di Mauro cesare.dimauro at a-tono.com
Tue May 12 08:54:01 CEST 2009

Hi Collin

On Mon, May 11, 2009 11:14PM, Collin Winter wrote:

Hi Cesare,

On Mon, May 11, 2009 at 11:00 AM, Cesare Di Mauro <cesare.dimauro at a-tono.com> wrote: At the last PyCon3 at Italy I've presented a new Python implementation, which you'll find at http://code.google.com/p/wpython/ Good to see some more attention on Python performance! There's quite a bit going on in your changes; do you have an optimization-by-optimization breakdown, to give an idea about how much performance each optimization gives?

I planned it in the next release that will come may be next week.

I'll introduce some #DEFINEs and #IFs in the code, so that only specific optimizations will be enabled.

Looking over the slides, I see that you still need to implement functionality to make testtrace pass, for example; do you have a notion of how much performance it will cost to implement the rest of Python's semantics in these areas?

Very little. That's because there are only two tests on test_trace that don't pass.

I think that the reason stays in the changes that I made in the loops. With my code SETUP_LOOP and POP_BREAK are completely removed, so the code in settrace will failt to recognize the loop and the virtual machine crashes.

I'll fix it in the second release that I have planned.

Also, I checked out wpython at head to run Unladen Swallow's benchmarks against it, but it refuses to compile with either gcc 4.0.1 or 4.3.1 on Linux (fails in Python/ast.c). I can send you the build failures off-list, if you're interested.

Thanks, Collin Winter

I'm very interested, thanks. That's because I worked only on Windows machines, so I definitely need to test and fix it to let it run on any other platform.

Cesare

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