Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.python > #10772

Re: Early binding as an option

Path csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path <python-python-list@m.gmane.org>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.000
X-Spam-Evidence '*H*': 1.00; '*S*': 0.00; 'sure.': 0.05; 'cached': 0.07; 'used.': 0.07; 'python': 0.08; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:80.91.229.12': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:lo.gmane.org': 0.09; 'rewritten': 0.09; 'though)': 0.09; 'am,': 0.13; 'wrote:': 0.15; 'executed.': 0.16; 'lookups': 0.16; 'optimizing': 0.16; 'subject:Early': 0.16; 'pm,': 0.16; 'aug': 0.19; 'header:In-Reply-To:1': 0.22; 'tue,': 0.23; 'code': 0.24; 'tried': 0.27; 'sort': 0.28; 'compile': 0.29; 'code,': 0.29; 'binding': 0.30; 'loads': 0.30; 'chris': 0.32; 'rather': 0.33; 'to:addr:python-list': 0.34; 'header:X-Complaints-To:1': 0.34; 'header:User-Agent:1': 0.34; 'probably': 0.35; 'certain': 0.36; 'some': 0.37; 'but': 0.37; 'could': 0.37; 'received:org': 0.38; 'subject:: ': 0.38; 'two': 0.38; 'case': 0.39; 'should': 0.39; 'header:Mime-Version:1': 0.39; 'to:addr:python.org': 0.39; 'might': 0.39; 'where': 0.40; 'increase': 0.64; 'minutes': 0.67; 'hand,': 0.76; 'interesting,': 0.84
X-Injected-Via-Gmane http://gmane.org/
To python-list@python.org
From Gelonida N <gelonida@gmail.com>
Subject Re: Early binding as an option
Date Wed, 03 Aug 2011 00:54:24 +0200
References <CAPTjJmpWN1Tq-46UoHjh_-q9ahkivTWmLJR3_eF9iThHwXQnhA@mail.gmail.com> <j19mbp$985$1@dough.gmane.org> <CAPTjJmr8mjYKTYu9EdKc-QRaFfSwH0rbVdAhnW-ysfvOZujJqQ@mail.gmail.com> <j19t8g$jqa$1@dough.gmane.org> <CAPTjJmo9r1RggHG5JaB7XbDM0y-bCmaYWfnO5vMjKhSoF+DTHA@mail.gmail.com>
Mime-Version 1.0
Content-Type text/plain; charset=ISO-8859-1
Content-Transfer-Encoding 7bit
X-Gmane-NNTP-Posting-Host unicorn.dungeon.de
User-Agent Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.18) Gecko/20110617 Lightning/1.0b2 ""
In-Reply-To <CAPTjJmo9r1RggHG5JaB7XbDM0y-bCmaYWfnO5vMjKhSoF+DTHA@mail.gmail.com>
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.12
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-list>
List-Post <mailto:python-list@python.org>
List-Help <mailto:python-list-request@python.org?subject=help>
List-Subscribe <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.1811.1312325709.1164.python-list@python.org> (permalink)
Lines 32
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1312325709 news.xs4all.nl 23920 [2001:888:2000:d::a6]:50195
X-Complaints-To abuse@xs4all.nl
Xref x330-a1.tempe.blueboxinc.net comp.lang.python:10772

Show key headers only | View raw


On 08/03/2011 12:26 AM, Chris Angelico wrote:
> On Tue, Aug 2, 2011 at 11:21 PM, Gelonida N <gelonida@gmail.com> wrote:
>> On the other hand: It might be interesting, that the early binding would
>> just take place when python is invoked with -O
>>
> 
> This could be an excellent safety catch, but on the other hand, it
> might destroy all value of the feature - once again, it would be
> optimizing in the sole case where the code is probably better
> rewritten in C.
> 
> Or would this be a sort of "half-way house" - this is where we need
> more performance, let's spend two minutes tweaking it in Python rather
> than dropping to C - to get some of the performance gains?

Not really sure.

I would guess, that really tight inner loops should be rewritten with
Cython (never tried it though) or in C if performance is really that
critical.

On the other hand it could be nice to get a certain performance increase
with some pragmas without rendering the code completely unreadable.

I have loads of places in my code, where name lookups were required only
at compile time or at the first time when code is executed.

For every consecutive call a cached object-reference could be used.



Back to comp.lang.python | Previous | Next | Find similar | Unroll thread


Thread

Re: Early binding as an option Gelonida N <gelonida@gmail.com> - 2011-08-03 00:54 +0200

csiph-web