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What malloc does macOS use in userspace? How about kernel?

• egberts1 16d ago
  In NextSTEP 3, it was zoned-based allocation. Rhapsody and early MacOS X, Darwin also used zone-based Early iPhone also zone-based. Later MacOS X implemented scalable zone, magazine allocator. iPhone 12+ then went Nano allocator, ScalableZone + large/VM allocator Latest iOS/iPadOS use Nano2
  • ddcc7 15d ago
    NanoV2 was only used for smaller size classes. The current allocator is xzone malloc: https://github.com/apple-oss-distributions/libmalloc/blob/main/doc/xzone_malloc.md https://github.com/apple-oss-distributions/libmalloc/blob/ma...
    • egberts1 15d ago
      Thanks, I needed that!