Note: this is an updating post. Introduction snmalloc is a memory allocator by Microsoft Research that uses a “message passing” scheme. You can find its source code here. It is designed to be performant in highly parallel workloads where memory allocated in one thread is typically deallocated in another thread. A nice catch is that snmalloc is highly customizable, and more to my interest, security mitigations can be customized. It also provides abstraction layers for different architectures (AAL) and platforms (PAL).