mimalloc (pronounced "me-malloc") is a free and open-source compact general-purpose memory allocator developed by Microsoft[2] with focus on performance characteristics.

[4] mimalloc was initially developed for the run-time systems of the Lean and Koka languages.

Notable design aspects include free list sharding, eager page reset, first-class heaps.

mimalloc is available on Windows, Mac OS X, Linux and *BSD.

[6] This article about software created, produced or developed by Microsoft is a stub.