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Systems InfrastructureJun 13, 2025

Jemalloc's Postmortem Is a Useful Case Study in Long-Lived Infrastructure

Jason Evans says active upstream development of jemalloc has ended after roughly two decades spanning FreeBSD, Firefox, and Facebook. The postmortem is notable less as nostalgia than as a technical history of fragmentation failures, portability work, and the maintenance burden that follows low-level infrastructure for years.