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New PYMALLOC_DEBUG function void _PyMalloc_DebugDumpStats(void).
This displays stats about the # of arenas, pools, blocks and bytes, to stderr, both used and reserved but unused. CAUTION: Because PYMALLOC_DEBUG is on, the debug malloc routine adds 16 bytes to each request. This makes each block appear two size classes higher than it would be if PYMALLOC_DEBUG weren't on. So far, playing with this confirms the obvious: there's a lot of activity in the "small dict" size class, but nothing in the core makes any use of the 8-byte or 16-byte classes.
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@ -102,6 +102,7 @@ DL_IMPORT(void *) _PyMalloc_DebugRealloc(void *p, size_t nbytes);
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DL_IMPORT(void) _PyMalloc_DebugFree(void *p);
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DL_IMPORT(void) _PyMalloc_DebugDumpAddress(const void *p);
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DL_IMPORT(void) _PyMalloc_DebugCheckAddress(const void *p);
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DL_IMPORT(void) _PyMalloc_DebugDumpStats(void);
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#define _PyMalloc_MALLOC _PyMalloc_DebugMalloc
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#define _PyMalloc_REALLOC _PyMalloc_DebugRealloc
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#define _PyMalloc_FREE _PyMalloc_DebugFree
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