[Python-Dev] [Python-checkins] cpython (2.7): Backport early-out 91259f061cfb to reduce the cost of bb1a2944bcb6 (original) (raw)
Benjamin Peterson benjamin at python.org
Thu Nov 12 01:50:05 EST 2015
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On Tue, Oct 6, 2015, at 19:12, raymond.hettinger wrote:
https://hg.python.org/cpython/rev/37aee118e1a3 changeset: 98578:37aee118e1a3 branch: 2.7 parent: 98572:60c44a09c5fc user: Raymond Hettinger <python at rcn.com> date: Tue Oct 06 23:12:02 2015 -0400 summary: Backport early-out 91259f061cfb to reduce the cost of bb1a2944bcb6
files: Modules/collectionsmodule.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/Modules/collectionsmodule.c b/Modules/collectionsmodule.c --- a/Modules/collectionsmodule.c +++ b/Modules/collectionsmodule.c @@ -651,6 +651,9 @@ Pyssizet n; PyObject *item; + if (PySIZE(deque) == 0) + return; +
dequeue is not varsized in Python 2.7, so using Py_SIZE() is incorrect.
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