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py-spy is a sampling profiler for Python programs. It lets you visualize what your Python program is spending time on without restarting the program or modifying the code in any way. py-spy is extremely low overhead: it is written in Rust for speed and doesn't run in the same process as the profiled Python program. This means py-spy is safe to use against production Python code. py-spy works from the command line and takes either the PID of the program you want to sample from or the command...
C/C++ function instrumentation (AOP, exception/stack tracing, GC)
...Libinstrument tries to be as non-intrusive as possible, while trying to help the developer offering basic reflection.
There are Unit Tests for each class and method, testing is driven with CTest.