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AI Tools 80% 1 min readMay 13, 2026, 5:19 PM

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

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30-second summary

Microsoft Research releases mimalloc, an open-source, high-performance memory allocator designed as a drop-in replacement for malloc/free with bounded worst-case allocation times and low overhead.

mimalloc: A new, high-performance, scalable memory allocator for the modern era
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mimalloc is an open-source, modern, scalable memory allocator that is a drop-in replacement for malloc and free. It is relatively small (~12K lines), with clear internal data structures, and is easy to build and integrate into other projects. It provides bounded worst-case allocation times (up to OS primitives), bounded space overhead, low internal fragmentation, and minimal contention by relying almost exclusively on atomic operations.

The post mimalloc: A new, high-performance, scalable memory allocator for the modern era appeared first on Microsoft Research.

Source: mimalloc: A new, high-performance, scalable memory allocator for the modern era. Read the full piece at the source.

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