On each allocation, I need to book keep 64 bytes of metadata which describes that allocation. Currently, I do store this metadata outside and look it up when need arises. Needless to say this slows down things for heavily multithreaded programs. I am trying to optimize my design and data structures. It would be great if I can store my metadata along with jemalloc and look it up using jemalloc's quick look up which is already optimized for concurrency.
I found following threads to be relevant, any inputs on existing implementations will be helpful. https://github.com/jemalloc/jemalloc/issues/203
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