Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!ecngs!feeder2.ecngs.de!newsfeed.freenet.ag!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.028 X-Spam-Evidence: '*H*': 0.94; '*S*': 0.00; 'subject:Python': 0.06; '64-bit': 0.07; 'pypy': 0.07; '32-bit': 0.09; 'executed': 0.09; 'obsolete': 0.09; 'url:github': 0.09; 'url:blog': 0.10; 'cc:addr :python-list': 0.11; 'python': 0.11; '2.7': 0.14; 'wrote:': 0.18; 'written': 0.21; 'cc:addr:python.org': 0.22; 'fine': 0.24; 'initial': 0.24; "haven't": 0.24; 'cc:2**0': 0.24; "i've": 0.25; 'header:In-Reply-To:1': 0.27; 'appear': 0.29; "doesn't": 0.30; 'said,': 0.30; 'message-id:@mail.gmail.com': 0.30; "i'm": 0.30; 'code': 0.31; '20%': 0.31; 'really,': 0.31; 'routine': 0.31; 'subject:what': 0.31; 'though.': 0.31; 'run': 0.32; 'guess': 0.33; 'older': 0.33; 'subject:the': 0.34; 'but': 0.35; 'received:google.com': 0.35; 'really': 0.36; 'revert': 0.36; 'ubuntu': 0.36; 'subject:?': 0.36; 'project': 0.37; 'performance': 0.37; 'being': 0.38; 'sometimes': 0.38; 'depends': 0.38; 'rather': 0.38; 'heard': 0.39; 'url:2012': 0.39; '8bit%:6': 0.40; 'how': 0.40; 'even': 0.60; 'most': 0.60; 'year.': 0.61; 'john': 0.61; "you're": 0.61; 'back': 0.62; 'increase': 0.74; 'gain': 0.79; 'occupied': 0.84; 'subject:latest': 0.84; 'touched': 0.84; 'execution,': 0.91; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:mime-version:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=IebyPEeS7g8WZX3uJwM+CCvlZc64RVQDbLMjaMlG8QI=; b=XxD2swS37vs2HNMpb3I4rSInBQTa+kr01jeKorAvdYHIjz5s8QYfmcOz4r9wnNerPc /lCbwbWSKOR5OQpGSc0yTeb93ana1Bs46keVzFJkh5ndqpxPrlj2musmhpLtsrscA5Ed lZGIVrTFCUi13Vc9YT2WxnJt3ocd/TO+Y5b/xEx6pxpBdDNB5gYrlNV3eHoHF1T49MYf Jv3IKyepDu1wayoJuGjwS0klJbdXipF7sjS02zNxftjMXlLiaDJLrmZeHagZ+9CYxQEw MzM0/Luvm3dkqK87j+xbi0YBmgg+BDNMU0fouWxICrqkGN4e2CcbavcFLcd+5FN/cPlp MdKA== X-Received: by 10.112.125.232 with SMTP id mt8mr7951345lbb.110.1365244095208; Sat, 06 Apr 2013 03:28:15 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <6ac24546-6cc6-4a01-9fa6-3b52d64484e3@googlegroups.com> References: <6ac24546-6cc6-4a01-9fa6-3b52d64484e3@googlegroups.com> From: Joshua Landau Date: Sat, 6 Apr 2013 11:27:34 +0100 Subject: Re: JIT compilers for Python, what is the latest news? To: John Ladasky Content-Type: multipart/alternative; boundary=089e01160d6053a4bc04d9aea98c Cc: python-list X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 76 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1365244103 news.xs4all.nl 6893 [2001:888:2000:d::a6]:40761 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:42906 --089e01160d6053a4bc04d9aea98c Content-Type: text/plain; charset=ISO-8859-1 On 5 April 2013 03:29, John Ladasky wrote: > I'm revisiting a project that I haven't touched in over a year. It was > written in Python 2.6, and executed on 32-bit Ubuntu 10.10. I experienced > a 20% performance increase when I used Psyco, because I had a > computationally-intensive routine which occupied most of my CPU cycles, and > always received the same data type. (Multiprocessing also helped, and I > was using that too.) > > I have now migrated to a 64-bit Ubuntu 12.10.1, and Python 3.3. I would > rather not revert to my older configuration. That being said, it would > appear from my initial reading that 1) Psyco is considered obsolete and is > no longer maintained, 2) Psyco is being superseded by PyPy, 3) PyPy doesn't > support Python 3.x, or 64-bit optimizations. > > Do I understand all that correctly? > > I guess I can live with the 20% slower execution, but sometimes my code > would run for three solid days... > If you're not willing to go far, I've heard really, really good things about Numba. I've not used it, but seriously: http://jakevdp.github.io/blog/2012/08/24/numba-vs-cython/. Also, PyPy is fine for 64 bit, even if it doesn't gain much from it. So going back to 2.7 might give you that 20% back for almost free. It depends how complex the code is, though. --089e01160d6053a4bc04d9aea98c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On 5 April 2013 03:29, John Ladasky <= john_ladask= y@sbcglobal.net> wrote:
I'm revisiting a project that I haven't touched in= over a year. =A0It was written in Python 2.6, and executed on 32-bit Ubunt= u 10.10. =A0I experienced a 20% performance increase when I used Psyco, bec= ause I had a computationally-intensive routine which occupied most of my CP= U cycles, and always received the same data type. =A0(Multiprocessing also = helped, and I was using that too.)

I have now migrated to a 64-bit Ubuntu 12.10.1, and Python 3.3. =A0I would = rather not revert to my older configuration. =A0That being said, it would a= ppear from my initial reading that 1) Psyco is considered obsolete and is n= o longer maintained, 2) Psyco is being superseded by PyPy, 3) PyPy doesn= 9;t support Python 3.x, or 64-bit optimizations.

Do I understand all that correctly?

I guess I can live with the 20% slower execution, but sometimes my code wou= ld run for three solid days...

If= you're not willing to go far, I've heard really, really good thing= s about Numba. I've not used it, but seriously:=A0http://jakevdp.github.io/b= log/2012/08/24/numba-vs-cython/.

Also, PyPy is fine for 64 bit, even if it d= oesn't gain much from it. So going back to 2.7 might give you that 20% = back for almost free. It depends how complex the code is, though.
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