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Don't raise an exception on normal return from generator. (GH-19473)

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Mark Shannon 2020-06-04 13:23:35 +01:00 • committed by GitHub
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2 changed files with 3 additions and 1 deletions
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Misc/NEWS.d/next/Core and Builtins/2020-04-11-13-07-49.bpo-4022.Ctpn_F.rst Normal file
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@ -0,0 +1 @@
Improve performance of generators by not raising internal StopIteration.

3
Objects/genobject.c
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@ -231,7 +231,8 @@ gen_send_ex(PyGenObject *gen, PyObject *arg, int exc, int closing)
if (PyAsyncGen_CheckExact(gen)) { if (PyAsyncGen_CheckExact(gen)) {
PyErr_SetNone(PyExc_StopAsyncIteration); PyErr_SetNone(PyExc_StopAsyncIteration);
} }
else { else if (arg) {
/* Set exception if not called by gen_iternext() */
PyErr_SetNone(PyExc_StopIteration); PyErr_SetNone(PyExc_StopIteration);
} }
} }