Merged revisions 70647,70652 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r70647 | antoine.pitrou | 2009-03-28 20:10:13 +0100 (sam., 28 mars 2009) | 3 lines
Publicize the GC untracking optimization
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r70652 | antoine.pitrou | 2009-03-28 20:17:54 +0100 (sam., 28 mars 2009) | 3 lines
Fix a typo and be more specific
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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 @@
(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`.)
+
.. ======================================================================