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> This isn't using the Rust runtime heap, Rust does not have a specific "Rust runtime heap."

• IshKebab 2y ago
  It does, it has a default global heap allocator.
  • simonask 2y ago
    That's not a "Rust runtime", that's an extension point. The default setting is `malloc()`.
  • steveklabnik 2y ago
    That's not part of Rust, that's a feature of its standard library. This is the same as C, where a freestanding implementation doesn't include malloc. Put another way, there's no issues with a library using its own heap if it wants to.