Re: Blog "about python 3"

From	Terry Reedy <tjreedy@udel.edu>
Subject	Re: Blog "about python 3"
Date	2014-01-08 14:26 -0500
References	(14 earlier) <mailman.4976.1388960067.18130.python-list@python.org> <2fbf4f89-caaa-4fab-8d7e-ff7ef84029a2@googlegroups.com> <lah4ei$g5k$1@ger.gmane.org> <mailman.5153.1389139359.18130.python-list@python.org> <cd28325a-7c02-43be-b94c-fa29a20acf52@googlegroups.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.5192.1389209238.18130.python-list@python.org> (permalink)

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On 1/8/2014 4:59 AM, wxjmfauth@gmail.com wrote:
[responding to me]
> The FSR acts more as an coding scheme selector

That is what PEP 393 describes and what I and many others have said. The 
FSR saves memory by selecting from three choices the most compact coding 
scheme for each string.

I ask again, have you read PEP 393? If you are going to critique the 
FSR, you should read its basic document.

 > than as a code point optimizer.

I do not know what you mean by 'code point optimizer'.

> Claiming that it saves memory is some kind of illusion;

Do you really think that the mathematical fact "10026 < 20040 < 40044" 
(from your example below) is some kind of illusion? If so, please take 
your claim to a metaphysics list. If not, please stop trolling.

> a little bit as saying "Py2.7 uses "relatively" less memory than
> Py3.2 (UCS-2)".

This is inane as 2.7 and 3.2 both use the same two coding schemes. 
Saying '1 < 2' is different from saying '2 < 2'.

On 3.3+
>>>> sys.getsizeof('a' * 10000 + 'z')
> 10026
>>>> sys.getsizeof('a' * 10000 + '€')
> 20040
>>>> sys.getsizeof('a' * 10000 + '\U00010000')
> 40044

3.2- wide (UCS-4) builds use about 40050 bytes for all three unicode 
strings. One again, you have posted examples that show how FSR saves 
memory, thus negating your denial of the saving.

-- 
Terry Jan Reedy

Thread

Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-30 19:41 +0000
  Re: Blog "about python 3" Steven D'Aprano <steve@pearwood.info> - 2013-12-30 20:49 +0000
    Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-30 21:29 +0000
    Re: Blog "about python 3" Ethan Furman <ethan@stoneleaf.us> - 2013-12-30 14:38 -0800
    Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2013-12-31 12:09 +1100
    Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-31 04:38 +0000
    Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2013-12-31 15:44 +1100
    Re: Blog "about python 3" Ethan Furman <ethan@stoneleaf.us> - 2013-12-30 20:33 -0800
    Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-31 04:59 +0000
    Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-31 08:22 +0000
      Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-12-31 20:53 +1100
        Re: Blog "about python 3" Antoine Pitrou <solipsis@pitrou.net> - 2013-12-31 14:13 +0000
          Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2013-12-31 10:41 -0500
            Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-01 02:54 +1100
            Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-12-31 15:55 +0000
            Re: Blog "about python 3" Robin Becker <robin@reportlab.com> - 2014-01-02 17:36 +0000
              Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-03 15:49 +1100
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-03 04:01 -0500
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-03 02:10 -0800
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-03 21:24 +1100
                Re: Blog "about python 3" Ethan Furman <ethan@stoneleaf.us> - 2014-01-03 08:56 -0800
                Re: Blog "about python 3" Robin Becker <robin@reportlab.com> - 2014-01-03 12:28 +0000
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-03 09:57 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-04 02:32 +1100
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-03 17:00 -0500
                Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-04 04:04 +0000
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-04 08:55 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 01:17 +1100
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-04 11:10 -0800
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-04 17:46 -0500
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-05 06:23 -0800
                Re: Blog "about python 3" Ned Batchelder <ned@nedbatchelder.com> - 2014-01-05 10:20 -0500
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-05 17:14 -0500
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-07 05:34 -0800
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-07 09:54 -0500
                Re: Blog "about python 3" Tim Delaney <timothy.c.delaney@gmail.com> - 2014-01-08 09:38 +1100
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-07 19:02 -0500
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-08 01:59 -0800
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-08 14:26 -0500
                Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-08 20:04 +0000
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-05 17:48 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 10:28 +1100
                Re: Blog "about python 3" Ned Batchelder <ned@nedbatchelder.com> - 2014-01-04 12:51 -0500
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-05 13:27 +1100
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 13:32 +1100
                Re: Blog "about python 3" MRAB <python@mrabarnett.plus.com> - 2014-01-05 02:41 +0000
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-04 22:20 -0500
                Re: Blog "about python 3" Rustom Mody <rustompmody@gmail.com> - 2014-01-05 10:12 +0530
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-05 00:11 -0500
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-05 17:28 +1100
                Re: Blog "about python 3" Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-01-05 14:05 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 15:01 +1100
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-05 11:34 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-06 03:51 +1100
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-05 12:09 -0500
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-06 11:42 +1100
                Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-05 17:56 -0500
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-06 10:59 +1100
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-06 12:23 +1100
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-06 12:54 +1100
                Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-06 05:53 +0000
                Re: Blog "about python 3" Devin Jeanpierre <jeanpierreda@gmail.com> - 2014-01-05 00:00 -0800
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-05 23:28 +1100
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 23:48 +1100
                Re: Blog "about python 3" Roy Smith <roy@panix.com> - 2014-01-05 11:10 -0500
                Re: Blog "about python 3" Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-01-05 13:51 -0500
            Re: Blog "about python 3" David Hutto <dwightdhutto@gmail.com> - 2014-01-02 13:25 -0500
            Re: Blog "about python 3" Terry Reedy <tjreedy@udel.edu> - 2014-01-02 13:37 -0500
            Re: Blog "about python 3" Antoine Pitrou <solipsis@pitrou.net> - 2014-01-02 23:57 +0000
            Re: Blog "about python 3" Robin Becker <robin@reportlab.com> - 2014-01-03 10:32 +0000
            Re: Blog "about python 3" Robin Becker <robin@reportlab.com> - 2014-01-03 11:14 +0000
              Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-04 05:52 -0800
                Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-05 13:41 +1100
                Re: Blog "about python 3" Chris Angelico <rosuav@gmail.com> - 2014-01-05 13:54 +1100
                Re: Blog "about python 3" wxjmfauth@gmail.com - 2014-01-05 02:39 -0800
            Re: Blog "about python 3" Robin Becker <robin@reportlab.com> - 2014-01-03 11:37 +0000
            Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-04 07:30 +0000
        Re: Blog "about python 3" Johannes Bauer <dfnsonfsduifb@gmx.de> - 2014-01-05 13:14 +0100
          Re: Blog "about python 3" Stefan Behnel <stefan_ml@behnel.de> - 2014-01-05 14:55 +0100
        Re: Blog "about python 3" Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-05 13:10 +0000
    Re: Blog "about python 3" Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-12-31 20:04 +1100
    Re: Blog "about python 3" Devin Jeanpierre <jeanpierreda@gmail.com> - 2013-12-30 20:25 -0800

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