Re: Micro Python -- a lean and efficient implementation of Python 3

Newsgroups	comp.lang.python
Date	2014-06-10 12:27 -0700
References	(9 earlier) <538ecdef$0$11109$c3e8da3@news.astraweb.com> <7xoay9w1h0.fsf@ruckus.brouhaha.com> <20140604060152.2cdf8198@bigbox.christie.dr> <61778024-C072-4635-9B88-F36431B6AA6E@gmail.com> <mailman.10843.1402107662.18130.python-list@python.org>
Message-ID	<ac6d6893-d11b-4c8e-bf38-5f4200fcc163@googlegroups.com> (permalink)
Subject	Re: Micro Python -- a lean and efficient implementation of Python 3
From	wxjmfauth@gmail.com

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Le samedi 7 juin 2014 04:20:22 UTC+2, Tim Chase a écrit :
> On 2014-06-06 09:59, Travis Griggs wrote:
> 
> > On Jun 4, 2014, at 4:01 AM, Tim Chase wrote:
> 
> > > If you use UTF-8 for everything
> 
> > 
> 
> > It seems to me, that increasingly other libraries (C, etc), use
> 
> > utf8 as the preferred string interchange format.
> 
> 
> 
> I definitely advocate UTF-8 for any streaming scenario, as you're
> 
> iterating unidirectionally over the data anyways, so why use/transmit
> 
> more bytes than needed.  The only failing of UTF-8 that I've found in
> 
> the real world(*) is when you have to requirement of constant-time
> 
> indexing into strings.
> 
> 
> 
> -tkc

And once again, just an illustration,

>>> timeit.repeat("(x*1000 + y)", setup="x = 'abc'; y = 'z'")
[0.9457552436453511, 0.9190932610143818, 0.9322044912393039]
>>> timeit.repeat("(x*1000 + y)", setup="x = 'abc'; y = '\u0fce'")
[2.5541921791045183, 2.52434366066052, 2.5337417948967413]
>>> timeit.repeat("(x*1000 + y)", setup="x = 'abc'.encode('utf-8'); y = 'z'.encode('utf-8')")
[0.9168235779232532, 0.8989583403075017, 0.8964204541650247]
>>> timeit.repeat("(x*1000 + y)", setup="x = 'abc'.encode('utf-8'); y = '\u0fce'.encode('utf-8')")
[0.9320969737165115, 0.9086006535332558, 0.9051715140790861]
>>> 
>>> 
>>> sys.getsizeof('abc'*1000 + '\u0fce')
6040
>>> sys.getsizeof(('abc'*1000 + '\u0fce').encode('utf-8'))
3020
>>>


But you know, that's not the problem.

When a see a core developper discussing benchmarking,
when the same application using non ascii chars become
1, 2, 5, 10, 20 if not more, slower comparing to pure
ascii, I'm wondering if there is not a serious problem
somewhere.

(and also becoming slower that Py3.2)

BTW, very easy to explain.

I do not understand why the "free, open, what-you-wish-here, ... "
software is so often pushing to the adoption of serious
corporate products.

jmf

Thread

Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-04 00:41 +0300
  Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 20:37 -0700
    Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 13:52 +1000
      Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 21:40 -0700
        Re: Micro Python -- a lean and efficient implementation of Python 3 Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-03 23:02 -0600
        Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:16 +1000
          Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve@pearwood.info> - 2014-06-04 07:42 +0000
            Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Rubin <no.email@nospam.invalid> - 2014-06-04 00:58 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 11:06 +0100
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 06:01 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 Marko Rauhamaa <marko@pacujo.net> - 2014-06-04 14:57 +0300
                Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 07:25 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 Paul Rubin <no.email@nospam.invalid> - 2014-06-04 11:25 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 12:53 +0100
                Re: Micro Python -- a lean and efficient implementation of Python 3 Marko Rauhamaa <marko@pacujo.net> - 2014-06-04 15:17 +0300
                Re: Micro Python -- a lean and efficient implementation of Python 3 Robin Becker <robin@reportlab.com> - 2014-06-04 13:31 +0100
                Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-04 13:51 +0000
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 00:32 -0700
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 02:13 -0700
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-04 07:21 -0500
              Re: Micro Python -- a lean and efficient implementation of Python 3 Travis Griggs <travisgriggs@gmail.com> - 2014-06-06 09:59 -0700
                Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-06 13:29 -0400
              Re: Micro Python -- a lean and efficient implementation of Python 3 Tim Chase <python.list@tim.thechases.com> - 2014-06-06 21:20 -0500
                Re: Micro Python -- a lean and efficient implementation of Python 3 wxjmfauth@gmail.com - 2014-06-10 12:27 -0700
        Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:20 +1000
        Re: Micro Python -- a lean and efficient implementation of Python 3 Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2014-06-04 10:00 +0200
      Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-04 14:42 -0400
        Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-04 19:06 -0700
          Re: Micro Python -- a lean and efficient implementation of Python 3 Roy Smith <roy@panix.com> - 2014-06-05 09:59 -0400
            Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-06 01:33 +1000
    Re: Micro Python -- a lean and efficient implementation of Python 3 Steven D'Aprano <steve@pearwood.info> - 2014-06-04 05:20 +0000
      Re: Micro Python -- a lean and efficient implementation of Python 3 Rustom Mody <rustompmody@gmail.com> - 2014-06-03 22:36 -0700
      Re: Micro Python -- a lean and efficient implementation of Python 3 Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-03 23:55 -0600
      Re: Micro Python -- a lean and efficient implementation of Python 3 Terry Reedy <tjreedy@udel.edu> - 2014-06-04 03:00 -0400
      Re: Micro Python -- a lean and efficient implementation of Python 3 Chris Angelico <rosuav@gmail.com> - 2014-06-04 17:10 +1000

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