Comments on: Restricted tinypy to C++ compiler

By: gautier

gautier — Tue, 08 Dec 2009 16:19:14 +0000

OMG OMG I was thinking about doing exactly this !!

By: Shared Items – December 6, 2009 | booyaa dot org

Shared Items – December 6, 2009 | booyaa dot org — Sun, 06 Dec 2009 06:02:54 +0000

[...] Restricted tinypy to C++ compiler [...]

By: phil hassey

phil hassey — Fri, 04 Dec 2009 17:51:40 +0000

@Ryan – yeah, it generates classes that can be used in C++ Check out the svn and go into examples and run ./build .. Check out the pygame.hh and pygame.cc that are produced.

(You might need to do an ln ../builtins.h builtins.h to get it to work)

By: Ryan Schneider

Ryan Schneider — Fri, 04 Dec 2009 17:42:36 +0000

Does it support creating C++ classes consumable within C++? That is, can I define a Python class and then refer to the C++ized class from outside of Python, or does it just do functions?

I’ve been thinking about prototyping an iPhone game I’d like to build in pygame, and it’d be really cool if I could reuse my game logic module in the actual game.

By: philhassey

philhassey — Thu, 03 Dec 2009 19:47:36 +0000

@mark – that’s quite true about memory allocations. With the julia.py example (included in svn right now) you can see that I create a single “pos” object for the pixel position to be passed to the set_at() method.

I did this because I found that creating a new list for each pixel was really slowing things down. By re-using the same list, I got a major speedup.

By: mark dufour

mark dufour — Thu, 03 Dec 2009 18:15:24 +0000

looking at the shedskin test set, I’d say the performance difference is more like 1-100x, and depends very much on what you’re doing. the cpython builtins and memory subsytem are rather efficient. so if you’re using strings a lot, or sets, and/or many other small objects, chances are a (straightforward) translation to C++ is actually not that much faster and sometimes even slower. but of course usually there is a good speedup, especially if you avoid things that really slow C++ down (usually memory allocations).

By: philhassey

philhassey — Thu, 03 Dec 2009 17:08:49 +0000

@GWF: C++ is like 4-40x faster than Cpython which is about 2x faster than tinypy.

By: GWF

GWF — Thu, 03 Dec 2009 16:36:48 +0000

This looks very fun and interesting. Do you have any sense of the performance between cpython, tinypy, and the generated C++?

By: rockins

rockins — Thu, 03 Dec 2009 11:16:11 +0000

Owesome, Phil.

By: Ginta

Ginta — Wed, 02 Dec 2009 21:38:54 +0000

@Donny: You might tae a look at pyjs.org. It does something like this for javascript.