bulk-allocator is implementations for GlobalAlloc holding memory cache. The instance acquires bulk memories from the backend, and frees them on the drop at once for the performance.
Method dealloc does not free the specified pointer soon, but pools in the cache.
Method alloc pops and returns from the cache if not empty; otherwise, alloc allocates a
bulk memory from the backend, splits into pieces to make cache at first.
It is when the instance is dropped that the memory chunks are deallocated.
License: LGPL-3.0-or-later OR Apache-2.0