gh-126868: Add freelist for compact int objects #126865
Fixup
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| Original file line number | Diff line number | Diff line change |
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@@ -3620,13 +3620,11 @@ long_richcompare(PyObject *self, PyObject *other, int op) | |
| void | ||
| _PyLong_ExactDealloc(PyObject *self) | ||
| { | ||
| if (_PyLong_IsCompact((PyLongObject *)self)) { | ||
| _Py_FREELIST_FREE(ints, self, PyObject_Free); | ||
| return; | ||
| } | ||
| PyObject_Free(self); | ||
| } | ||
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| static void | ||
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@@ -3650,6 +3648,14 @@ long_dealloc(PyObject *self) | |
| } | ||
| } | ||
| } | ||
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| if (PyLong_CheckExact(self)) { | ||
| if (_PyLong_IsCompact((PyLongObject *)self)) { | ||
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There was a problem hiding this comment. @Fidget-Spinner The Also, can we remove the |
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| _Py_FREELIST_FREE(ints, self, PyObject_Free); | ||
| return; | ||
| } | ||
| } | ||
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| Py_TYPE(self)->tp_free(self); | ||
| } | ||
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I just realised that we didnt check for if it's a smallint cached value here. It should be rejected there
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Nevermind. It's not needed because (theoretically) the refcount of a smallint never hits 0 due to it being immortal, so this code will never be called on it. Can you add an assert to be safe?
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This also means my comment about the small ints was wrong. Could you remove that please?
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The comment has been adapted. If the refcount can never become zero, then the code in
long_deallocchecking for small ints can be removed (perhaps also with an assert). Since this is something unrelated to the freelists I will make a separate PR for that and rebase this one.There was a problem hiding this comment.
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@Fidget-Spinner I think your first remark was right after all and we do need to check for smallints (at least in the 32-bit stable ABI build). I will add the check once there is consensus on #127120 (which might very well be the status quo)