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bpo-40521: Disable list free list in subinterpreters #19959

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Merged
merged 2 commits into from
May 6, 2020
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bpo-40521: Disable list free list in subinterpreters #19959

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bpo-40521: Disable list free list in subinterpreters
vstinner May 6, 2020
bcfa9ca
Fix typo
vstinner May 6, 2020
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9 changes: 8 additions & 1 deletion Objects/listobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,15 @@ list_preallocate_exact(PyListObject *self, Py_ssize_t size)

/* Empty list reuse scheme to save calls to malloc and free */
#ifndef PyList_MAXFREELIST
#define PyList_MAXFREELIST 80
# define PyList_MAXFREELIST 80
#endif

/* bpo-40521: list free lists are shared by all interpreters. */
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
# undef PyList_MAXFREELIST
# define PyList_MAXFREELIST 0
#endif

static PyListObject *free_list[PyList_MAXFREELIST];
static int numfree = 0;

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