rusty_alloc-api

The safe Rust surface over rusty_alloc, a pure-Rust remake of mimalloc that measures at-or-below mimalloc on instructions retired for real programs (lua 0.97x, perl 1.00x, sqlite 1.00x) and below jemalloc across the board (lua 0.85x, perl 0.90x, sqlite 0.98x), while detecting double frees that upstream silently accepts and carrying no data race on its free path.

Status: 1.0.0 — the API is frozen. See the rusty_alloc crate page for the performance evidence and its scope (instruction counts, not wall-clock).

Upgrade from 0.3.x or earlier — mandatory. 0.4.0 fixed three platform-independent use-after-frees; treat 0.3.2 and earlier as unsound on every target.

What it gives you

• GlobalAlloc — drop it in as #[global_allocator].
• First-class heaps — create independent heaps, allocate from them, destroy them wholesale.
• Allocator — the unstable allocator_api trait, behind a feature.

use rusty_alloc_api::RustyAlloc;

#[global_allocator]
static ALLOC: RustyAlloc = RustyAlloc;

fn main() {
    let v: Vec<u64> = (0..1000).collect();
    println!("{}", v.len());
}

Features

debug_checks, secure, profile — each forwards to the identically-named feature on rusty_alloc.

Security: threat model · disclosure policy.

License

MIT. See LICENSE at the repository root.

Hardening status

Tier standard · Audited 2026-08-19 (survey) · v1.0.0 gates 12/12 · Full checklist

███████████████████░ 95%  ·  21 Completed · 0 Scheduled · 1 Incomplete · 33 N/A

Architect — Tim — Mata Network