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| Hybrid pool allocator | |
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| Example allocator that tries to satisfy memory allocations for small sizes | |
| from a set of fixed pools, but always falls back to malloc/realloc/free if | |
| a larger size is requested or the pools have been exhausted. | |
| This may be useful to reduce memory churn when the platform allocator does | |
| not handle allocations for a lot of small memory areas efficiently. |