pre gc:
tuple                 9903507     +1876
list                   461999     +1775
dict                  1911954     +1517
set                   7722698      +403
ScopeInfo                1204      +402
Parser                   1203      +402
JvmTool                   370       +74
OptionHistoryRecord      5743       +73
OrderedDict             24411       +68
JarDependency            1063       +63
OptionHistory            3980       +24
ListValueComponent        276       +13
RelocateRule               56       +11
cell                      873        +4
SafeConfigParser            6        +2
_SingleFileConfig           6        +2
OptionTracker               3        +1
function                14936        +1
_ChainedConfig              3        +1
defaultdict                15        +1
OrderedSet                  4        +1
instancemethod            172        -1
OptionValueContainer       89        -1
RankedValue              1029        -5

found 6301 unreachable objects during gc

post gc:
function               14935        -1
OptionTracker              2        -1
_ChainedConfig             2        -1
defaultdict               14        -1
OrderedSet                 3        -1
SafeConfigParser           4        -2
_SingleFileConfig          4        -2
cell                     869        -4
ListValueComponent       245       -31
OrderedDict            24343       -68
OptionHistory           3807      -173
OptionHistoryRecord     5439      -304
ScopeInfo                804      -400
Parser                   803      -400
set                  7722297      -401
dict                 1910265     -1689
tuple                9901631     -1876
list                  460111     -1888