rust-embedded/heapless

Health v2 · maintenance only

Adoption not part of the score

2014 stars · 251 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Rust crate providing `static`-friendly data structures (vectors, queues, maps, etc.) that don't require dynamic memory allocation. It is designed for `no_std` and embedded environments where a heap allocator is unavailable or undesirable.

Use cases

• use data structures without a heap allocator in embedded Rust
• store collections in static variables in no_std code
• avoid dynamic memory allocation on microcontrollers
• implement fixed-capacity buffers and queues for real-time systems
• write heap-free Rust for bare-metal targets

When to choose

• you're writing no_std or embedded Rust and need vectors, queues, or maps without a heap
• you need deterministic, allocation-free data structures for real-time or safety-critical code
• you want widely adopted, well-maintained static data structures (100M+ crate downloads)

When to avoid

• you're writing std Rust where dynamic allocation is fine and std collections are more flexible
• you need growable structures without fixed capacity limits
• you need data structures not offered by the crate's fixed-size collection set

Facets

library · maturity stable

data-generation concurrency developer-tools embedded-systems programming-languages rust embedded cross-platform no-std no-heap data-structures static-allocation embedded-rust algorithms

Member repositories

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