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Hybrid pool allocator

third-party/fb-mysql/8.0.20/extra/duktape/duktape-2.3.0/examples/alloc-hybrid/README.rst

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===================== Hybrid pool allocator

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.