On 19.11.2018 11:53, Antoine Pitrou wrote: > On Mon, 19 Nov 2018 11:28:46 +0100 > Victor Stinner <vstin...@redhat.com> wrote: >> Python internals rely on internals to implement further optimizations, >> than modifying an "immutable" tuple, bytes or str object, because you >> can do that at the C level. But I'm not sure that I would like 3rd >> party extensions to rely on such things. > > I'm not even talking about *modifying* tuples or str objects, I'm > talking about *accessing* their value without going through an abstract > API that does slot lookups, indirect function calls and object unboxing. > > For example, people may need a fast way to access the UTF-8 > representation of a unicode object. Without making indirect function > calls, and ideally without making a copy of the data either. How do > you do that using the generic C API?
Something else you need to consider is creating instances of types, e.g. a tuple. In C you will have to be able to put values into the data structure before it is passed outside the function in order to build the tuple. If you remove this possibility to have to copy data all the time, losing the advantages of having a rich C API. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Nov 19 2018) >>> Python Projects, Coaching and Consulting ... http://www.egenix.com/ >>> Python Database Interfaces ... http://products.egenix.com/ >>> Plone/Zope Database Interfaces ... http://zope.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: 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/ http://www.malemburg.com/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
