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Medium · memory_optimization · Quant Developer interview question · memory-resource, pmr, pool-allocator, c++17, memory-optimization, low-latency, custom-allocator
High-frequency trading systems pre-allocate large memory pools at startup to eliminate the non-deterministic latency of malloc and global heap fragmentation during live trading. The C++17 Polymorphic Memory Resource (PMR) interface standardizes pluggable custom allocators, allowing order-book entries and market-data buffers to draw from pre-committed pools with O(1) allocation cost and zero contention on the global heap. Task Implement the do_allocate method within the PoolAllocatorResource cla