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Low Overhead Allocation Sampling with VMProf in PyPy's GC

Introduction¶ There are many time-based statistical profilers around (like VMProf or py-spy just to name a few). They allow the user to pick a trade-off between profiling precision and runtime overhead. On the other hand there are memory profilers such as memray. They can be handy for finding leaks or for discovering functions that allocate a lot of memory. Memory profilers typlically save every single allocation a program does. This results in precise profiling, but larger overhead. In this pos...

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