From 9d81def047320ff7b50a472e23fc1a1e8e7c9f57 Mon Sep 17 00:00:00 2001 From: Antoine Pitrou Date: Sat, 28 Mar 2009 19:20:09 +0000 Subject: Merged revisions 70647,70652 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r70647 | antoine.pitrou | 2009-03-28 20:10:13 +0100 (sam., 28 mars 2009) | 3 lines Publicize the GC untracking optimization ........ r70652 | antoine.pitrou | 2009-03-28 20:17:54 +0100 (sam., 28 mars 2009) | 3 lines Fix a typo and be more specific ........ --- Doc/whatsnew/2.7.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Doc/whatsnew/2.7.rst b/Doc/whatsnew/2.7.rst index e44a42b..9148743 100644 --- a/Doc/whatsnew/2.7.rst +++ b/Doc/whatsnew/2.7.rst @@ -129,6 +129,18 @@ A few performance enhancements have been added: (Suggested by Martin von Loewis and implemented by Antoine Pitrou; :issue:`4074`.) +* The garbage collector tries to avoid tracking simple containers which + can't be part of a cycle. As of now, this is true for tuples and dicts + containing atomic types (such as ints, strings, etc.). Transitively, a dict + containing tuples of atomic types won't be tracked either. This helps bring + down the individual cost of each garbage collection, since it decreases the + number of objects to be considered and traversed by the collector. + + To help diagnosing this optimization, a new function in the :mod:`gc` + module, :func:`is_tracked`, returns True if a given instance is tracked + by the garbage collector, False otherwise. + (Contributed by Antoine Pitrou; :issue:`4688`.) + .. ====================================================================== -- cgit v0.12