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mimalloc: A new, high-performance, scalable memory allocator for the modern era

mimalloc is a new, high-performance, and scalable memory allocator designed as a drop-in replacement for standard `malloc` and `free`. This small, easily integrable C library offers bounded worst-case allocation times, low fragmentation, and minimal contention by leveraging atomic operations, making it ideal for memory-intensive AI development.

Microsoft Research·May 13, 2026

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mimalloc: A new, high-performance, scalable memory allocator for the modern era — Kapyn