valgrind on python's deepcopy

gistfile1.txt

$ valgrind --tool=massif python -c "from copy import deepcopy; deepcopy(dict(foo='bar'))"
==1322== Massif, a heap profiler
==1322== Copyright (C) 2003-2015, and GNU GPL'd, by Nicholas Nethercote
==1322== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==1322== Command: python -c from\ copy\ import\ deepcopy;\ deepcopy(dict(foo='bar'))
==1322==
==1322==


$ ms_print massif.out.1319 > ms.1319


--------------------------------------------------------------------------------
Command:            python -c from copy import deepcopy; deepcopy(dict(foo='bar'))
Massif arguments:   (none)
ms_print arguments: massif.out.1319
--------------------------------------------------------------------------------


    MB
2.074^                                                              :::::     
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   0 +----------------------------------------------------------------------->Mi
     0                                                                   25.50

Number of snapshots: 74
 Detailed snapshots: [4, 5, 7, 13, 15, 19, 20, 21, 28, 33, 34, 35, 36, 37, 38, 39, 40, 47, 48, 51, 52, 53, 56, 58, 61, 63, 64 (peak)]


[...]
| ->03.82% (28,032B) 0x4EB0C4A: PyDict_Merge (in /usr/lib64/libpython2.7.so.1.0)
| | ->03.82% (28,032B) 0x4EB0E16: PyDict_Copy (in /usr/lib64/libpython2.7.so.1.0)
| |   ->03.82% (28,032B) 0x4F239EC: _PyImport_FixupExtension (in /usr/lib64/libpython2.7.so.1.0)
| |     ->02.15% (15,744B) in 4 places, all below massif's threshold (1.00%)
| |     | 
| |     ->01.68% (12,288B) 0x4F3003D: Py_InitializeEx (in /usr/lib64/libpython2.7.so.1.0)
| |       ->01.68% (12,288B) 0x4F4034D: Py_Main (in /usr/lib64/libpython2.7.so.1.0)
| |         ->01.68% (12,288B) 0x5B3FC03: (below main) (in /usr/lib64/libc-2.17.so)
[...]