On Mon, Apr 15, 2019, 15:27 Michael Sullivan <su...@msully.net> wrote:
> > The main question is if anyone ever used Py_TRACE_REFS? Does someone > > use sys.getobjects() or PYTHONDUMPREFS environment variable? > > I used sys.getobjects() today to track down a memory leak in the > mypyc-compiled version of mypy. > > We were leaking memory badly but no sign of the leak was showing up in > mypy's gc.get_objects() based profiler. Using a debug build and switching > to sys.getobjects() showed that we were badly leaking int objects. A quick > inspection of the values in question (large and random looking) suggested > we were leaking hash values, and that quickly pointed me to > https://github.com/mypyc/mypyc/pull/562. > > I don't have any strong feelings about whether to keep it in the "default" > debug build, though. I was using a debug build that I built myself with > every debug feature that seemed potentially useful. > This is mostly to satisfy my curiosity, so feel free to ignore: did you try using address sanitizer or valgrind? -n >
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