Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
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| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2403.06695 |
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Inhaltsangabe:
- In C++, objects can be allocated in static memory, on the stack, or on the heap -- the latter being significantly more performance-costly than the former options. We hypothesized that programmers, particularly those involved in widely-used open-source projects, would be conscious of these performance costs and consequently avoid heap allocations. To test this hypothesis, we compiled and executed 797 automated tests across 13 C and 10 C++ open GitHub projects, measuring their heap allocations with Valgrind and stack allocations using DynamoRIO instrumentation. Our findings showed a wide variation in heap allocations, ranging from 0 to 99\% with an average of 9.26\%. We also found that C++ programs use heap less frequently than C programs. Contrary to our initial intuition, this suggests that heap allocations are actively employed in both C and C++ programs. Determining the prevalence of objects in these allocations remains a topic for future research.