Message353603
> Would [func tp_clear] help with memory usage in functions or was BPO-33418 addressed in another way since?
Having a tp_clear for all container objects that can be involved in reference cycles will help the GC free memory. BPO-33418 may be contrived but it does demonstrate a problem that could happen in "real" code. If you have a long-running program, tracking down a memory leak due to reference cycles can be fiendishly difficult. That's why Tim originally wrote cyclops and why I started working on cyclic GC in the first place.
It is a "quality of implementation" issue. It is not wrong for CPython to leak memory if you create reference cycles (not all types are required to implement the GC protocol). I expect users would be surprised if it happens since the majority have never used Python without the cyclic GC. |
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2019-09-30 17:45:13 | nascheme | set | recipients:
+ nascheme, tim.peters, pitrou, vstinner, christian.heimes, petr.viktorin, methane, lukasz.langa, Mark.Shannon, jdemeyer, pablogsal, miss-islington |
2019-09-30 17:45:13 | nascheme | set | messageid: <1569865513.09.0.396972431305.issue38006@roundup.psfhosted.org> |
2019-09-30 17:45:13 | nascheme | link | issue38006 messages |
2019-09-30 17:45:12 | nascheme | create | |
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