https://jasper-aa64.github.io/tags/memory-pool/Recent content in Memory-Pool on JasperHugoen-usThu, 17 Sep 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/hot-path-memory-allocators/Thu, 17 Sep 2026 00:00:00 +0000https://jasper-aa64.github.io/posts/hot-path-memory-allocators/Every technique in this post does the same thing at a different layer: move an uncertain, kernel-involving operation off the hot path and force it to happen once, upfront, before it can ambush a single request. An object pool replaces malloc’s variable-cost search with an always-O(1) free list. mlockall and careful mallopt tuning stop the kernel from quietly taking pages back — and pre-faulting closes the one gap mlock alone leaves open. A hand-rolled arena allocator makes the STL itself cooperate with a custom allocator backed by bump-pointer memory. std::pmr solves the same STL-cooperation problem the standard library’s way — trading compile-time speed for runtime flexibility.