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Re: Flexible string representation, unicode, typography, ...

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From Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject Re: Flexible string representation, unicode, typography, ...
Date Sat, 25 Aug 2012 12:05:08 +0100
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On 25/08/2012 10:46, Frank Millman wrote:
> On 25/08/2012 10:58, Mark Lawrence wrote:
>> On 25/08/2012 08:27, wxjmfauth@gmail.com wrote:
>>>
>>> Unicode design: a flat table of code points, where all code
>>> points are "equals".
>>> As soon as one attempts to escape from this rule, one has to
>>> "pay" for it.
>>> The creator of this machinery (flexible string representation)
>>> can not even benefit from it in his native language (I think
>>> I'm correctly informed).
>>>
>>> Hint: Google -> "Das grosse Eszett"
>>>
>>> jmf
>>>
>>
>> It's Saturday morning, I'm stone cold sober, had a good sleep and I'm
>> still baffled as to the point if any.  Could someone please enlightem me?
>>
>
> Here's what I think he is saying. I am posting this to test the water. I
> am also confused, and if I have got it wrong hopefully someone will
> correct me.
>
> In python 3.3, unicode strings are now stored as follows -
>    if all characters can be represented by 1 byte, the entire string is
> composed of 1-byte characters
>    else if all characters can be represented by 1 or 2 bytea, the entire
> string is composed of 2-byte characters
>    else the entire string is composed of 4-byte characters
>
> There is an overhead in making this choice, to detect the lowest number
> of bytes required.
>
> jmfauth believes that this only benefits 'english-speaking' users, as
> the rest of the world will tend to have strings where at least one
> character requires 2 or 4 bytes. So they incur the overhead, without
> getting any benefit.
>
> Therefore, I think he is saying that he would have preferred that python
> standardise on 4-byte characters, on the grounds that the saving in
> memory does not justify the performance overhead.
>
> Frank Millman
>
>

I thought Terry Reedy had shot down any claims about performance 
overhead, and that the memory savings in many cases must be substantial 
and therefore worthwhile.  Or have I misread something?  Or what?

-- 
Cheers.

Mark Lawrence.

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Thread

Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-23 05:47 -0700
  Re: Flexible string representation, unicode, typography, ... Neil Hodgson <nhodgson@iinet.net.au> - 2012-08-23 23:57 +1000
    Re: Flexible string representation, unicode, typography, ... MRAB <python@mrabarnett.plus.com> - 2012-08-23 16:11 +0100
    Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-23 09:19 -0600
    Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-23 11:33 -0700
      Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-23 13:22 -0600
        Re: Flexible string representation, unicode, typography, ... rusi <rustompmody@gmail.com> - 2012-08-24 09:06 -0700
          Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-24 17:47 +0100
          Re: Flexible string representation, unicode, typography, ... Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-24 14:34 -0400
      Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-23 20:34 +0100
  Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-23 15:18 +0100
  Re: Flexible string representation, unicode, typography, ... Ramchandra Apte <maniandram01@gmail.com> - 2012-08-24 07:38 -0700
    Re: Flexible string representation, unicode, typography, ... Antoine Pitrou <solipsis@pitrou.net> - 2012-08-25 00:24 +0000
      Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 00:27 -0700
        Re: Flexible string representation, unicode, typography, ... Ben Finney <ben+python@benfinney.id.au> - 2012-08-25 17:54 +1000
      Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 00:27 -0700
        Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-25 09:58 +0100
        Re: Flexible string representation, unicode, typography, ... Frank Millman <frank@chagford.com> - 2012-08-25 11:46 +0200
          Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 08:47 -0700
          Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 08:47 -0700
            Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-25 16:26 -0600
              Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 23:59 -0700
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-26 09:50 -0600
              Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-25 23:59 -0700
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-26 11:49 +0000
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-26 09:40 -0600
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-26 20:13 +0000
                Re: Flexible string representation, unicode, typography, ... Dan Sommers <dan@tombstonezero.net> - 2012-08-26 13:45 -0700
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-27 12:16 -0700
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-27 14:14 -0600
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-27 13:37 -0700
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-29 04:38 -0700
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-29 04:38 -0700
                Re: Flexible string representation, unicode, typography, ... Neil Hodgson <nhodgson@iinet.net.au> - 2012-08-28 09:54 +1000
                Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-29 13:59 +1000
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-28 22:15 -0600
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-29 08:05 +0000
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-29 04:40 -0700
                Re: Flexible string representation, unicode, typography, ... Dave Angel <d@davea.name> - 2012-08-29 08:01 -0400
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-29 08:43 -0700
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-30 06:55 +0000
                Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-30 18:59 +1000
                Re: Flexible string representation, unicode, typography, ... Roy Smith <roy@panix.com> - 2012-08-30 07:02 -0400
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-30 16:00 +0000
                Re: Flexible string representation, unicode, typography, ... Terry Reedy <tjreedy@udel.edu> - 2012-08-30 16:44 -0400
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-31 12:32 +0000
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-31 09:13 -0600
                Re: Flexible string representation, unicode, typography, ... Roy Smith <roy@panix.com> - 2012-08-31 08:43 -0400
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-31 14:54 +0000
                Re: Flexible string representation, unicode, typography, ... Antoine Pitrou <solipsis@pitrou.net> - 2012-08-30 15:01 +0000
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 00:36 -0700
                Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-02 09:58 +0100
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-02 03:06 -0600
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 11:58 -0700
                Re: Flexible string representation, unicode, typography, ... Michael Torrie <torriem@gmail.com> - 2012-09-02 13:45 -0600
                Re: Flexible string representation, unicode, typography, ... Dave Angel <d@davea.name> - 2012-09-02 16:07 -0400
                Re: Flexible string representation, unicode, typography, ... Terry Reedy <tjreedy@udel.edu> - 2012-09-02 16:38 -0400
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-03 01:42 +0000
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-03 18:26 +0300
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-04 00:53 +0000
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 11:58 -0700
                Re: Flexible string representation, unicode, typography, ... Peter Otten <__peter__@web.de> - 2012-09-02 11:52 +0200
                Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-02 11:36 +0100
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-02 15:00 +0300
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 22:39 -0700
                Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-03 07:11 +0100
                Re: Flexible string representation, unicode, typography, ... Peter Otten <__peter__@web.de> - 2012-09-03 08:15 +0200
                Re: Flexible string representation, unicode, typography, ... Terry Reedy <tjreedy@udel.edu> - 2012-09-03 04:38 -0400
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-03 18:56 +0300
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 22:39 -0700
                Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-02 13:23 +0100
                Re: Flexible string representation, unicode, typography, ... Roy Smith <roy@panix.com> - 2012-09-02 08:35 -0400
                Re: Flexible string representation, unicode, typography, ... Ramchandra Apte <maniandram01@gmail.com> - 2012-09-02 06:48 -0700
                Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-09-02 15:46 +0100
                Re: Flexible string representation, unicode, typography, ... Ramchandra Apte <maniandram01@gmail.com> - 2012-09-02 06:48 -0700
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-09-03 12:33 -0600
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-09-02 00:36 -0700
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-30 10:27 -0600
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-02 23:38 +0300
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-09-03 01:54 +0000
                Re: Flexible string representation, unicode, typography, ... Terry Reedy <tjreedy@udel.edu> - 2012-09-02 22:33 -0400
                Re: Flexible string representation, unicode, typography, ... Roy Smith <roy@panix.com> - 2012-09-03 11:24 -0400
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-03 18:41 +0300
                Re: Flexible string representation, unicode, typography, ... Serhiy Storchaka <storchaka@gmail.com> - 2012-09-03 00:45 +0300
                Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-30 01:54 +1000
                Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-29 22:34 +1000
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-29 04:40 -0700
                Re: Flexible string representation, unicode, typography, ... wxjmfauth@gmail.com - 2012-08-27 12:16 -0700
                Re: Flexible string representation, unicode, typography, ... Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-26 15:42 -0600
                Re: Flexible string representation, unicode, typography, ... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-26 23:31 +0000
                Re: Flexible string representation, unicode, typography, ... Paul Rubin <no.email@nospam.invalid> - 2012-08-26 17:47 -0700
        Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-25 21:04 +1000
        Re: Flexible string representation, unicode, typography, ... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-25 12:05 +0100
        Re: Flexible string representation, unicode, typography, ... Chris Angelico <rosuav@gmail.com> - 2012-08-25 21:19 +1000
        Re: Flexible string representation, unicode, typography, ... Terry Reedy <tjreedy@udel.edu> - 2012-08-25 07:23 -0400

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