I'll comment more on this later this week... >From my first impression, I'm not too thrilled by the prospect of making the Unicode implementation more complicated by having three different representations on each object.
I also don't see how this could save a lot of memory. As an example take a French text with say 10mio code points. This would end up appearing in memory as 3 copies on Windows: one copy stored as UCS2 (20MB), one as Latin-1 (10MB) and one as UTF-8 (probably around 15MB, depending on how many accents are used). That's a saving of -10MB compared to today's implementation :-) "Martin v. Löwis" wrote: > I have been thinking about Unicode representation for some time now. > This was triggered, on the one hand, by discussions with Glyph Lefkowitz > (who complained that his server app consumes too much memory), and Carl > Friedrich Bolz (who profiled Python applications to determine that > Unicode strings are among the top consumers of memory in Python). > On the other hand, this was triggered by the discussion on supporting > surrogates in the library better. > > I'd like to propose PEP 393, which takes a different approach, > addressing both problems simultaneously: by getting a flexible > representation (one that can be either 1, 2, or 4 bytes), we can > support the full range of Unicode on all systems, but still use > only one byte per character for strings that are pure ASCII (which > will be the majority of strings for the majority of users). > > You'll find the PEP at > > http://www.python.org/dev/peps/pep-0393/ > > For convenience, I include it below. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jan 25 2011) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ ::: Try our new mxODBC.Connect Python Database Interface for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com