From: INADA Naoki Date: Wed, 11 Jul 2018 08:42:49 +0000 (+0900) Subject: bpo-33597: Add What's New for PyGC_Head (GH-8236) X-Git-Tag: v3.8.0a1~1386 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d5c875bbf1ef9b24349d3243b1ffaab6a9d5a78e;p=python bpo-33597: Add What's New for PyGC_Head (GH-8236) --- diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index 5fe1c7166f..ace814e577 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -127,6 +127,10 @@ Optimizations first introduced in Python 3.4. It offers better performance and smaller size compared to Protocol 3 available since Python 3.0. +* Removed one ``Py_ssize_t`` member from ``PyGC_Head``. All GC tracked + objects (e.g. tuple, list, dict) size is reduced 4 or 8 bytes. + (Contributed by Inada Naoki in :issue:`33597`) + Build and C API Changes ======================= @@ -201,6 +205,10 @@ Changes in the Python API * :func:`shutil.copyfile` default buffer size on Windows was changed from 16 KiB to 1 MiB. +* ``PyGC_Head`` struct is changed completely. All code touched the + struct member should be rewritten. (See :issue:`33597`) + + CPython bytecode changes ------------------------