STINNER Victor added the comment:
I isolated the leak to attached bug.py script. Output:
---
haypo@selma$ ./python bug.py
[ Top 10 differences ]
bug.py:40: size=6728 B (+6728 B), count=80 (+80), average=84 B
bug.py:46: size=2464 B (+2464 B), count=28 (+28), average=88 B
bug.py:43: size=2464 B (+2464 B), count=28 (+28), average=88 B
---
It seems like compiling a Python source to AST causes the leak. The Python
source uses the following bytecodes:
25 170 LOAD_DEREF 0 (trace)
172 LOAD_METHOD 0 (append)
174 LOAD_CONST 0 (None)
176 CALL_METHOD 1
178 POP_TOP
AST of the code:
Expr(value=Call(func=Attribute(value=Name(id='trace', ctx=Load()),
attr='append', ctx=Load()), args=[NameConstant(value=None)], keywords=[]))
----------
Added file: http://bugs.python.org/file46929/bug.py
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<http://bugs.python.org/issue30542>
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