Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
This is an interesting idea. But I have two concerns. 1. It is hard to implement refcount-based optimization on Python implementations which do not use reference counting (i.e. PyPy). If the effect of this optimization will be significant, people will become writing a code that depends on it, and this will cause problems on other implementations. 2. Currently list1 + list2 + list3 returns a list which allocates the exact amount of memory needed to contain its content. But with the proposed changes the result list could preallocate more memory. If the result is a long living object, this can cause to wasting of memory. ---------- nosy: +serhiy.storchaka _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36229> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
