Hi Quinn, thanks for your response. I can confirm that with your code, I don't see an unbounded increase in memory usage. I've made some edits, and have produced two minimal examples, based on yours, that do show unbounded memory usage. LeakTestCtor.c (attached) is a modification to your library code that adds a library constructor and destructor function. LeakTestGlobal.cpp (attached) adds a global vector. Neither are leaking. Can you reproduce the increasing memory usage? Thanks, Chris LeakTestGlobal.cpp LeakTestCtor.c

Thanks for the response! We've now tried this on macOS Sequoia Version 15.6.1 (24G90) (arm64) and still see the increasing memory usage. I appreciate that dlclose might not unload the library, but I wouldn't expect it to then consume more resources on a reload.