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Re: Unicode 7

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Date Tue, 29 Apr 2014 12:59:23 -0500
From Tim Chase <python.list@tim.thechases.com>
To python-list@python.org
Subject Re: Unicode 7
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Xref csiph.com comp.lang.python:70723

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On 2014-04-29 10:37, wxjmfauth@gmail.com wrote:
> >>> timeit.repeat("(x*1000 + y)[:-1]", setup="x = 'abc'; y = 'z'")  
> [1.4027834829454946, 1.38714224331963, 1.3822586635296261]
> >>> timeit.repeat("(x*1000 + y)[:-1]", setup="x = 'abc'; y =
> >>> '\u0fce'")  
> [5.462776291480395, 5.4479432055423445, 5.447874284053398]
> >>> 
> >>> 
> >>> # more interesting
> >>> timeit.repeat("(x*1000 + y)[:-1]",\  
> ...     setup="x = 'abc'.encode('utf-8'); y =
> '\u0fce'.encode('utf-8')") [1.3496489533188765, 1.328654286266783,
> 1.3300913977710707]
> >>>   

While I dislike feeding the troll, what I see here is:  on your
machine, all unicode manipulations in the test should take ~5.4
seconds.  But Python notices that some of your strings *don't*
require a full 32-bits and thus optimizes those operations, cutting
about 75% of the processing time (wow...4-bytes-per-char to
1-byte-per-char, I wonder where that 75% savings comes from).

So rather than highlight any *problem* with Python, your [mostly
worthless microbenchmark non-realworld] tests show that Python's
unicode implementation is awesome.

Still waiting to see an actual bug-report as mentioned on the other
thread.

-tkc

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Unicode 7 wxjmfauth@gmail.com - 2014-04-29 10:37 -0700
  Re: Unicode 7 Tim Chase <python.list@tim.thechases.com> - 2014-04-29 12:59 -0500
    Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-04-29 21:53 -0700
      Re: Unicode 7 Steven D'Aprano <steve@pearwood.info> - 2014-05-01 05:00 +0000
        Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 11:04 -0700
          Re: Unicode 7 Terry Reedy <tjreedy@udel.edu> - 2014-05-01 18:38 -0400
            Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 19:29 -0700
              Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 19:39 -0700
              Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-02 13:01 +1000
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 20:16 -0700
              Re: Unicode 7 Terry Reedy <tjreedy@udel.edu> - 2014-05-02 01:05 -0400
            Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-02 03:15 +0000
          Re: Unicode 7 MRAB <python@mrabarnett.plus.com> - 2014-05-02 00:33 +0100
            Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 19:02 -0700
              Re: Unicode 7 Ben Finney <ben@benfinney.id.au> - 2014-05-02 12:39 +1000
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 19:59 -0700
              Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-02 08:45 +0000
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-02 19:08 +1000
                Re: Unicode 7 Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-05-02 13:04 +0300
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 03:39 -0700
                Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-02 11:55 +0000
                Re: Unicode 7 Marko Rauhamaa <marko@pacujo.net> - 2014-05-02 15:19 +0300
                Re: Unicode 7 Ben Finney <ben@benfinney.id.au> - 2014-05-03 07:07 +1000
                Re: Unicode 7 Roy Smith <roy@panix.com> - 2014-05-02 17:13 -0400
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 09:03 -0700
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 09:50 -0700
                Re: Unicode 7 Michael Torrie <torriem@gmail.com> - 2014-05-02 11:39 -0600
                Re: Unicode 7 Ned Batchelder <ned@nedbatchelder.com> - 2014-05-02 13:46 -0400
                Re: Unicode 7 Peter Otten <__peter__@web.de> - 2014-05-02 20:07 +0200
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 17:58 -0700
                Re: Unicode 7 Ned Batchelder <ned@nedbatchelder.com> - 2014-05-02 21:18 -0400
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 18:42 -0700
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-03 11:54 +1000
                Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-02 19:02 -0700
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-03 11:15 +1000
                Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-03 02:02 +0000
                Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-03 02:04 +0000
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-03 12:17 +1000
                Re: Unicode 7 Terry Reedy <tjreedy@udel.edu> - 2014-05-02 22:19 -0400
                Re: Unicode 7 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-03 12:57 -0400
                Re: Unicode 7 Tim Chase <python.list@tim.thechases.com> - 2014-05-02 07:58 -0500
              Re: Unicode 7 MRAB <python@mrabarnett.plus.com> - 2014-05-02 17:52 +0100
          Re: Unicode 7 Terry Reedy <tjreedy@udel.edu> - 2014-05-02 00:16 -0400
            Re: Unicode 7 Rustom Mody <rustompmody@gmail.com> - 2014-05-01 21:42 -0700
              Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-02 14:54 +1000
              Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-02 08:08 +0000
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-02 19:01 +1000
                Re: Unicode 7 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-02 11:52 +0000
                Re: Unicode 7 Ben Finney <ben@benfinney.id.au> - 2014-05-02 19:16 +1000
                Re: Unicode 7 Marko Rauhamaa <marko@pacujo.net> - 2014-05-02 13:05 +0300
                Re: Unicode 7 Chris Angelico <rosuav@gmail.com> - 2014-05-02 19:24 +1000
                Re: Unicode 7 MRAB <python@mrabarnett.plus.com> - 2014-05-02 18:07 +0100
  Re: Unicode 7 MRAB <python@mrabarnett.plus.com> - 2014-04-29 19:12 +0100
    Re: Unicode 7 wxjmfauth@gmail.com - 2014-04-30 00:06 -0700
      Re: Unicode 7 Tim Chase <python.list@tim.thechases.com> - 2014-04-30 13:48 -0500
        Re: Unicode 7 wxjmfauth@gmail.com - 2014-04-30 23:00 -0700

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