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

mimalloc is a new, high-performance memory allocator for modern applications. This drop-in replacement for malloc and free offers bounded allocation times, low fragmentation, and minimal contention by leveraging atomic operations, making it ideal for demanding AI development workloads. Its clear internal structure and ease of integration simplify adoption for developers seeking to optimize performance.

Microsoft Research·May 13, 2026

Opening Kapyn…