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Thread-Local Arena Allocator (jemalloc Arena Pattern)

Hard · memory_optimization · Quant Developer interview question · arena-allocator, jemalloc, memory_optimization, bump-pointer, thread-local, allocation

Arena allocators offer a high-performance memory strategy by pre-allocating a large memory pool for fast, repeated allocations. In quantitative finance, this "bump allocator" pattern is used in thread-local contexts to manage objects like orders and trades, eliminating lock contention and ensuring predictable low-latency performance. This implementation models the core logic of such an allocator for objects with a shared lifetime. Task Implement the ArenaAllocator struct to manage a pre-allocat