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Groups > comp.lang.python > #27204 > unrolled thread

How do I display unicode value stored in a string variable using ord()

Started byCharles Jensen <hopefullycharles@gmail.com>
First post2012-08-16 15:09 -0700
Last post2012-08-20 17:20 -0400
Articles 5 on this page of 145 — 26 participants

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  How do I display unicode value stored in a string variable using ord() Charles Jensen <hopefullycharles@gmail.com> - 2012-08-16 15:09 -0700
    Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-17 08:20 +1000
    Re: How do I display unicode value stored in a string variable using ord() Dave Angel <d@davea.name> - 2012-08-16 18:47 -0400
    Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-16 19:59 -0400
      Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-17 10:49 -0700
        Re: How do I display unicode value stored in a string variable using ord() Jerry Hill <malaclypse2@gmail.com> - 2012-08-17 14:21 -0400
          Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-17 11:45 -0700
          Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-17 11:45 -0700
            Re: How do I display unicode value stored in a string variable using ord() Dave Angel <d@davea.name> - 2012-08-17 16:55 -0400
            Re: How do I display unicode value stored in a string variable using ord() Dave Angel <d@davea.name> - 2012-08-17 23:30 -0400
              Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-18 04:10 +0000
                Re: How do I display unicode value stored in a string variable using ord() Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-18 09:18 -0600
            Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-18 03:59 +0000
      Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-17 10:49 -0700
    Re: How do I display unicode value stored in a string variable using ord() Alister <alister.ware@ntlworld.com> - 2012-08-17 06:30 +0000
    Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 01:09 -0700
      Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-18 12:27 +0000
        Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 08:07 -0700
          Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-18 16:25 +0100
          Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 01:36 +1000
          Re: How do I display unicode value stored in a string variable using ord() Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-18 09:51 -0600
            Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 09:38 -0700
              Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 02:57 +1000
              Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-18 18:28 +0100
                Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 11:05 -0700
                  Re: How do I display unicode value stored in a string variable using ord() MRAB <python@mrabarnett.plus.com> - 2012-08-18 19:34 +0100
                    Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 06:35 +0000
                      New internal string format in 3.3, was Re: How do I display unicode value stored in a string variable using ord() Peter Otten <__peter__@web.de> - 2012-08-19 09:43 +0200
                        Re: New internal string format in 3.3, was Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 08:56 +0000
                          Re: New internal string format in 3.3, was Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-19 02:24 -0700
                          Re: New internal string format in 3.3 Peter Otten <__peter__@web.de> - 2012-08-19 11:37 +0200
                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 03:19 -0700
                              Re: New internal string format in 3.3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 13:33 +0000
                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 03:19 -0700
                              Re: New internal string format in 3.3 Chris Angelico <rosuav@gmail.com> - 2012-08-19 20:26 +1000
                                Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 05:14 -0700
                                  Re: New internal string format in 3.3 Dave Angel <d@davea.name> - 2012-08-19 08:29 -0400
                                    Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 05:59 -0700
                                      Re: New internal string format in 3.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 14:46 +0100
                                        Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 07:09 -0700
                                        Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 07:09 -0700
                                          Re: New internal string format in 3.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 15:48 +0100
                                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 09:19 -0700
                                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 09:19 -0700
                                          Re: New internal string format in 3.3 Terry Reedy <tjreedy@udel.edu> - 2012-08-19 13:48 -0400
                                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 10:51 -0700
                                              Re: New internal string format in 3.3 Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 19:09 +0100
                                              Re: New internal string format in 3.3 Chris Angelico <rosuav@gmail.com> - 2012-08-20 07:50 +1000
                                              Re: New internal string format in 3.3 Michael Torrie <torriem@gmail.com> - 2012-08-19 23:38 -0600
                                                Re: New internal string format in 3.3 Roy Smith <roy@panix.com> - 2012-08-20 09:17 -0400
                                                  Re: New internal string format in 3.3 Michael Torrie <torriem@gmail.com> - 2012-08-20 22:18 -0600
                                                    Re: New internal string format in 3.3 Roy Smith <roy@panix.com> - 2012-08-21 07:48 -0400
                                            Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 10:51 -0700
                                      Re: New internal string format in 3.3 Terry Reedy <tjreedy@udel.edu> - 2012-08-19 13:56 -0400
                                    Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 05:59 -0700
                                  Re: New internal string format in 3.3 Dave Angel <d@davea.name> - 2012-08-19 08:35 -0400
                                Re: New internal string format in 3.3 wxjmfauth@gmail.com - 2012-08-19 05:14 -0700
                  Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 06:30 +0000
                Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 11:05 -0700
              Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-18 16:09 -0400
              Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-18 23:12 -0400
            Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 09:38 -0700
            Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 06:33 +0000
              Re: How do I display unicode value stored in a string variable using ord() Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-19 11:50 -0600
                Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 11:20 -0700
                  Re: How do I display unicode value stored in a string variable using ord() Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-19 12:31 -0600
                    Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 12:23 -0700
                Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 20:16 +0000
              Re: How do I display unicode value stored in a string variable using ord() Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-19 12:46 -0600
          Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-18 17:59 +0000
            Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 11:30 -0700
              Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-18 20:45 +0100
              Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 06:13 +0000
            Re: How do I display unicode value stored in a string variable using ord() rusi <rustompmody@gmail.com> - 2012-08-18 11:40 -0700
              Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-18 20:50 +0100
              Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-18 13:22 -0700
                Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-18 22:37 +0100
        Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-18 11:26 -0700
          Re: How do I display unicode value stored in a string variable using ord() MRAB <python@mrabarnett.plus.com> - 2012-08-18 19:59 +0100
            Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 07:17 +0000
          Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 10:46 +1000
            Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-18 19:11 -0700
              Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 12:19 +1000
                Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-18 19:35 -0700
                  Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 13:01 +1000
                    Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-18 20:10 -0700
                      Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 13:31 +1000
                        Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-18 22:58 -0700
                  Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 08:01 +0000
                    Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 01:11 -0700
                      Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 18:24 +1000
                        Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 01:44 -0700
                          Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-19 01:54 -0700
                            Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 11:46 +0100
                            Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-19 12:31 -0400
                      Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 10:51 +0000
                        Re: How do I display unicode value stored in a string variable using ord() Neil Hodgson <nhodgson@iinet.net.au> - 2012-08-21 17:03 +1000
          Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 06:09 +0000
            Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 01:04 -0700
              Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 13:25 +0000
                Re: How do I display unicode value stored in a string variable using ord() DJC <djc@news.invalid> - 2012-08-19 17:32 +0200
              Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-19 13:34 -0400
                Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 10:48 -0700
                  Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-19 11:11 -0700
                    Re: How do I display unicode value stored in a string variable using ord() Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-19 19:50 +0100
                    Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-19 17:59 -0400
                    Re: How do I display unicode value stored in a string variable using ord() rusi <rustompmody@gmail.com> - 2012-08-19 23:13 -0700
                  Abuse of Big Oh notation [was Re: How do I display unicode value stored in a string variable using ord()] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 20:15 +0000
                    Re: Abuse of Big Oh notation Paul Rubin <no.email@nospam.invalid> - 2012-08-19 16:42 -0700
                      Re: Abuse of Big Oh notation Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2012-08-20 09:24 +0100
                        Re: Abuse of Big Oh notation Paul Rubin <no.email@nospam.invalid> - 2012-08-20 09:01 -0700
                          Re: Abuse of Big Oh notation Chris Angelico <rosuav@gmail.com> - 2012-08-21 02:09 +1000
                          Re: Abuse of Big Oh notation Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-20 11:12 -0600
                            Re: Abuse of Big Oh notation Paul Rubin <no.email@nospam.invalid> - 2012-08-20 12:29 -0700
                              Re: Abuse of Big Oh notation 88888 Dihedral <dihedral88888@googlemail.com> - 2012-08-20 15:16 -0700
                              Re: Abuse of Big Oh notation 88888 Dihedral <dihedral88888@googlemail.com> - 2012-08-20 15:20 -0700
                            Re: Abuse of Big Oh notation Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-21 09:53 +0000
                        Re: Abuse of Big Oh notation wxjmfauth@gmail.com - 2012-08-20 11:42 -0700
                          Re: Abuse of Big Oh notation Ned Deily <nad@acm.org> - 2012-08-20 18:19 -0700
                          Abuse of subject, was Re: Abuse of Big Oh notation Peter Otten <__peter__@web.de> - 2012-08-21 09:52 +0200
                            Re: Abuse of subject, was Re: Abuse of Big Oh notation wxjmfauth@gmail.com - 2012-08-21 10:16 -0700
                            Re: Abuse of subject, was Re: Abuse of Big Oh notation wxjmfauth@gmail.com - 2012-08-21 10:16 -0700
                        Re: Abuse of Big Oh notation wxjmfauth@gmail.com - 2012-08-20 11:42 -0700
                  Re: How do I display unicode value stored in a string variable using ord() Hans Mulder <hansmu@xs4all.nl> - 2012-08-22 20:53 +0200
              Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-20 08:42 +1000
                Re: How do I display unicode value stored in a string variable using ord() Roy Smith <roy@panix.com> - 2012-08-19 19:24 -0400
                  Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-20 04:21 +0000
                    Re: How do I display unicode value stored in a string variable using ord() Roy Smith <roy@panix.com> - 2012-08-20 00:44 -0400
                      Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-20 05:56 +0000
                        Re: How do I display unicode value stored in a string variable using ord() Paul Rubin <no.email@nospam.invalid> - 2012-08-19 23:24 -0700
                    Re: How do I display unicode value stored in a string variable using ord() Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-20 12:58 -0400
              Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-19 20:35 -0400
              Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-20 14:07 +1000
            Re: How do I display unicode value stored in a string variable using ord() lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-19 11:13 +0100
              Re: How do I display unicode value stored in a string variable using ord() Chris Angelico <rosuav@gmail.com> - 2012-08-19 20:19 +1000
                Re: How do I display unicode value stored in a string variable using ord() lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-19 11:49 +0100
        Re: How do I display unicode value stored in a string variable using ord() "Blind Anagram" <noname@nowhere.com> - 2012-08-19 18:03 +0100
          Re: How do I display unicode value stored in a string variable using ord() wxjmfauth@gmail.com - 2012-08-19 10:33 -0700
            Re: How do I display unicode value stored in a string variable using ord() "Blind Anagram" <noname@nowhere.com> - 2012-08-19 19:04 +0100
          Re: How do I display unicode value stored in a string variable using ord() Dave Angel <d@davea.name> - 2012-08-19 14:05 -0400
            Re: How do I display unicode value stored in a string variable usingord() "Blind Anagram" <noname@nowhere.com> - 2012-08-19 19:18 +0100
          Re: How do I display unicode value stored in a string variable using ord() Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-19 20:31 +0000
          Re: How do I display unicode value stored in a string variable using ord() Terry Reedy <tjreedy@udel.edu> - 2012-08-19 17:03 -0400
          Re: How do I display unicode value stored in a string variable using ord() 88888 Dihedral <dihedral88888@googlemail.com> - 2012-08-19 17:32 -0700
          Re: How do I display unicode value stored in a string variable using ord() Piet van Oostrum <piet@vanoostrum.org> - 2012-08-20 17:20 -0400

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#27417 — Re: How do I display unicode value stored in a string variable usingord()

From"Blind Anagram" <noname@nowhere.com>
Date2012-08-19 19:18 +0100
SubjectRe: How do I display unicode value stored in a string variable usingord()
Message-ID<UfydnTpHubGes6zNnZ2dnUVZ8oidnZ2d@brightview.co.uk>
In reply to#27415
"Dave Angel"  wrote in message 
news:mailman.3519.1345399574.4697.python-list@python.org...

[...]
>
> This is an average slowdown by a factor of close to 2.3 on 3.3 when
> compared with 3.2.
>

Using your measurement numbers, I get an average of 1.95, not 2.3

================
Yes - you are right - my apologies.

But it is close enough to 2 to still be worth asking.

[toc] | [prev] | [next] | [standalone]

#27428

FromSteven D'Aprano <steve+comp.lang.python@pearwood.info>
Date2012-08-19 20:31 +0000
Message-ID<50314d27$0$29978$c3e8da3$5496439d@news.astraweb.com>
In reply to#27401
On Sun, 19 Aug 2012 18:03:34 +0100, Blind Anagram wrote:

> "Steven D'Aprano"  wrote in message
> news:502f8a2a$0$29978$c3e8da3$5496439d@news.astraweb.com...
> 
> > If you can consistently replicate a 100% to 1000% slowdown in string
> > handling, please report it as a performance bug:
> > 
> > http://bugs.python.org/
> > 
> > Don't forget to report your operating system.

[...]

> This is an average slowdown by a factor of close to 2.3 on 3.3 when
> compared with 3.2.
> 
> I am not posting this to perpetuate this thread but simply to ask
> whether, as you suggest, I should report this as a possible problem with
> the beta?

Possibly, if it is consistent and non-trivial. Serious performance 
regressions are bugs. Trivial ones, not so much.

Thanks to Terry Reedy, who has already asked the Python Devs about this 
issue, they have made it clear that they aren't hugely interested in 
micro-benchmarks in isolation. If you want the bug report to be taken 
seriously, you would need to run the full Python string benchmark. The 
results of that would be interesting to see.


-- 
Steven

[toc] | [prev] | [next] | [standalone]

#27432

FromTerry Reedy <tjreedy@udel.edu>
Date2012-08-19 17:03 -0400
Message-ID<mailman.3525.1345410260.4697.python-list@python.org>
In reply to#27401
On 8/19/2012 1:03 PM, Blind Anagram wrote:

> Running Python from a Windows command prompt,  I got the following on
> Python 3.2.3 and 3.3 beta 2:
>
> python33\python" -m timeit "('abc' * 1000).replace('c', 'de')"
> 10000 loops, best of 3: 39.3 usec per loop
> python33\python" -m timeit "('ab…' * 1000).replace('…', '……')"
> 10000 loops, best of 3: 51.8 usec per loop
> python33\python" -m timeit "('ab…' * 1000).replace('…', 'x…')"
> 10000 loops, best of 3: 52 usec per loop
> python33\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')"
> 10000 loops, best of 3: 50.3 usec per loop
> python33\python" -m timeit "('ab…' * 1000).replace('…', '€…')"
> 10000 loops, best of 3: 51.6 usec per loop
> python33\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')"
> 10000 loops, best of 3: 38.3 usec per loop
> python33\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')"
> 10000 loops, best of 3: 50.3 usec per loop
>
> python32\python" -m timeit "('abc' * 1000).replace('c', 'de')"
> 10000 loops, best of 3: 24.5 usec per loop
> python32\python" -m timeit "('ab…' * 1000).replace('…', '……')"
> 10000 loops, best of 3: 24.7 usec per loop
> python32\python" -m timeit "('ab…' * 1000).replace('…', 'x…')"
> 10000 loops, best of 3: 24.8 usec per loop
> python32\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')"
> 10000 loops, best of 3: 24 usec per loop
> python32\python" -m timeit "('ab…' * 1000).replace('…', '€…')"
> 10000 loops, best of 3: 24.1 usec per loop
> python32\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')"
> 10000 loops, best of 3: 24.4 usec per loop
> python32\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')"
> 10000 loops, best of 3: 24.3 usec per loop

This is one test repeated 7 times with essentially irrelevant 
variations. The difference is less on my system (50%). Others report 
seeing 3.3 as faster. When I asked on pydev, the answer was don't bother 
making a tracker issue unless I was personally interested in 
investigating why search is relatively slow in 3.3 on Windows. Any 
change would have to not slow other operations or severely impact search 
on other systems. I suggest the same answer to you.

If you seriously want to compare old and new unicode, go to
http://hg.python.org/cpython/file/tip/Tools/stringbench/stringbench.py
and click raw to download. Run on 3.2 and 3.3, ignoring the bytes times.

Here is a version of the first comparison from stringbench:
print(timeit('''('NOW IS THE TIME FOR ALL GOOD PEOPLE TO COME TO THE AID 
OF PYTHON'* 10).lower()'''))
Results are 5.6 for 3.2 and .8 for 3.3. WOW! 3.3 is 7 times faster!

OK, not fair. I cherry picked. The 7 times speedup in 3.3 likely is at 
least partly independent of the 393 unicode change. The same test in 
stringbench for bytes is twice as fast in 3.3 as 3.2, but only 2x, not 
7x. In fact, it may have been the bytes/unicode comparison in 3.2 that 
suggested that unicode case conversion of ascii chrs might be made faster.

The sum of the 3.3 unicode times is 109 versus 110 for 3.3 bytes and 125 
for 3.2 unicode. This unweighted sum is not really fair since the raw 
times vary by a factor of at least 100. But is does suggest that anyone 
claiming that 3.3 unicode is overall 'slower' than 3.2 unicode has some 
work to do.

There is also this. On my machine, the lowest bytes-time/unicode-time 
for 3.3 is .71. This suggests that there is not a lot of fluff left in 
the unicode code, and that not much is lost by the bytes to unicode 
switch for strings.

-- 
Terry Jan Reedy

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#27444

From88888 Dihedral <dihedral88888@googlemail.com>
Date2012-08-19 17:32 -0700
Message-ID<719badd5-c5ff-4c93-bda8-7e4ab92ec40e@googlegroups.com>
In reply to#27401
On Monday, August 20, 2012 1:03:34 AM UTC+8, Blind Anagram wrote:
> "Steven D'Aprano"  wrote in message 
> 
> news:502f8a2a$0$29978$c3e8da3$5496439d@news.astraweb.com...
> 
> 
> 
> On Sat, 18 Aug 2012 01:09:26 -0700, wxjmfauth wrote:
> 
> 
> 
> [...]
> 
> If you can consistently replicate a 100% to 1000% slowdown in string
> 
> handling, please report it as a performance bug:
> 
> 
> 
> http://bugs.python.org/
> 
> 
> 
> Don't forget to report your operating system.
> 
> 
> 
> ====================================================
> 
> For interest, I ran your code snippets on my laptop (Intel core-i7 1.8GHz) 
> 
> running Windows 7 x64.
> 
> 
> 
> Running Python from a Windows command prompt,  I got the following on Python 
> 
> 3.2.3 and 3.3 beta 2:
> 
> 
> 
> python33\python" -m timeit "('abc' * 1000).replace('c', 'de')"
> 
> 10000 loops, best of 3: 39.3 usec per loop
> 
> python33\python" -m timeit "('ab…' * 1000).replace('…', '……')"
> 
> 10000 loops, best of 3: 51.8 usec per loop
> 
> python33\python" -m timeit "('ab…' * 1000).replace('…', 'x…')"
> 
> 10000 loops, best of 3: 52 usec per loop
> 
> python33\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')"
> 
> 10000 loops, best of 3: 50.3 usec per loop
> 
> python33\python" -m timeit "('ab…' * 1000).replace('…', '€…')"
> 
> 10000 loops, best of 3: 51.6 usec per loop
> 
> python33\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')"
> 
> 10000 loops, best of 3: 38.3 usec per loop
> 
> python33\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')"
> 
> 10000 loops, best of 3: 50.3 usec per loop
> 
> 
> 
> python32\python" -m timeit "('abc' * 1000).replace('c', 'de')"
> 
> 10000 loops, best of 3: 24.5 usec per loop
> 
> python32\python" -m timeit "('ab…' * 1000).replace('…', '……')"
> 
> 10000 loops, best of 3: 24.7 usec per loop
> 
> python32\python" -m timeit "('ab…' * 1000).replace('…', 'x…')"
> 
> 10000 loops, best of 3: 24.8 usec per loop
> 
> python32\python" -m timeit "('ab…' * 1000).replace('…', 'œ…')"
> 
> 10000 loops, best of 3: 24 usec per loop
> 
> python32\python" -m timeit "('ab…' * 1000).replace('…', '€…')"
> 
> 10000 loops, best of 3: 24.1 usec per loop
> 
> python32\python" -m timeit "('XYZ' * 1000).replace('X', 'éç')"
> 
> 10000 loops, best of 3: 24.4 usec per loop
> 
> python32\python" -m timeit "('XYZ' * 1000).replace('Y', 'p?')"
> 
> 10000 loops, best of 3: 24.3 usec per loop
> 
> 
> 
> This is an average slowdown by a factor of close to 2.3 on 3.3 when compared 
> 
> with 3.2.
> 
> 
> 
> I am not posting this to perpetuate this thread but simply to ask whether, 
> 
> as you suggest, I should report this as a possible problem with the beta?

Un, another set of functions for seeding up ASCII string othe pertions 
might be needed. But it is better that Python 3.3 supports unicode strings
to be easy to be used by people in different languages first.

Anyway I think Cython and Pyrex can be used to tackle this problem.

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#27532

FromPiet van Oostrum <piet@vanoostrum.org>
Date2012-08-20 17:20 -0400
Message-ID<m2pq6ll0pf.fsf@cochabamba.vanoostrum.org>
In reply to#27401
"Blind Anagram" <noname@nowhere.com> writes:

> This is an average slowdown by a factor of close to 2.3 on 3.3 when
> compared with 3.2.
>
> I am not posting this to perpetuate this thread but simply to ask
> whether, as you suggest, I should report this as a possible problem with
> the beta?

Being a beta release, is it certain that this release has been compiled
with the same optimization level as 3.2?
-- 
Piet van Oostrum <piet@vanoostrum.org>
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]

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