Memory leak - what could _LogEntry be?

Ok so on the assumption that _LogEntry is involved in logging, I commented out anything to do with logging and sure enough the _LogEntry growth disappeared

However various other things are still leaking, and the memory usage is still ramping up. Any ideas for uncovering what’s causing the below?

show growth…
wrapper_descriptor 8315 +12
c_byte_Array_6144 13 +9
c_byte_Array_4096 22 +9
dict 25274 +7
VertexList 87 +6
getset_descriptor 5556 +4
member_descriptor 2045 +3
weakref 6939 +3
method_descriptor 6163 +1

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getset_descriptor 5564 +8
tuple 17200 +6
dict 25280 +6
StgDict 838 +4
c_byte_Array_6144 16 +3
c_byte_Array_4096 25 +3
PyCArrayType 125 +2
weakref 6941 +2
weakcallableproxy 125 +2
VertexList 89 +2

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dict 25291 +11
c_byte_Array_4096 30 +5
c_byte_Array_6144 21 +5
c_byte_Array_2048 23 +3
VertexList 90 +1

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show growth…

dict 25296 +5
getset_descriptor 5568 +4
tuple 17203 +3
StgDict 840 +2
PyCArrayType 126 +1
c_byte_Array_6144 22 +1
c_byte_Array_4096 31 +1
weakref 6942 +1
weakcallableproxy 126 +1
PyCPointerType 146 +1

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frame 12 +1

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show growth…

show growth…

getset_descriptor 5580 +12
tuple 17212 +9
StgDict 846 +6
PyCArrayType 129 +3
weakref 6945 +3
weakcallableproxy 129 +3
PyCPointerType 149 +3