fitzgen/bumpalo
A fast bump allocation arena for Rust observed · 2026-08-28
Health v2 · maintenance only
75/100
- Activity 94
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2844
- days_rel: n/a
- days_push: 41
- n_releases_24m: 0
Adoption not part of the score
2310 stars · 156 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
bumpalo is a fast bump allocation arena library for Rust that allocates objects by advancing a pointer through memory chunks. It enables extremely fast allocation and mass deallocation, at the cost of not invoking Drop or supporting individual object deallocation.
Use cases
- fast arena allocation in Rust
- allocate many short-lived objects efficiently
- phase-oriented batch deallocation of objects
- arena-allocated collections like Vec and String
- reduce allocator overhead in parsers and compilers
- allocate objects without individual free calls
When to choose
- you allocate many objects in a phase and free them all together
- allocation speed is a bottleneck and objects don't need Drop
- you want arena-based collections that allocate inside a shared arena
When to avoid
- you need to deallocate individual objects or reclaim memory mid-phase
- your objects have Drop implementations that must run on free
- you need general-purpose dynamic memory management
Facets
library · maturity stable
developer-tools concurrency developer-tools performance rust cross-platform arena-allocation bump-allocator memory-management no-std performance algorithms
10 sources
- readme: https://github.com/fitzgen/bumpalo · fetched 2026-08-28 · 0b177a941762
- homepage: https://docs.rs/bumpalo · fetched 2026-08-29 · 0292a5a1a8f3
- site_page: https://docs.rs/ · fetched 2026-08-29 · 6bcb786a7e4e
- site_page: https://docs.rs/crate/bumpalo/latest · fetched 2026-08-29 · 6a3309a03727
- site_page: https://docs.rs/crate/bumpalo/latest/features · fetched 2026-08-29 · c78e32a5c048
- site_page: https://docs.rs/about · fetched 2026-08-29 · 29ab7986fbf5
- site_page: https://docs.rs/about/badges · fetched 2026-08-29 · 6588cac258af
- site_page: https://docs.rs/about/builds · fetched 2026-08-29 · 811231ca4680
- site_page: https://docs.rs/about/metadata · fetched 2026-08-29 · 0dcdccb2b2b2
- site_page: https://docs.rs/about/redirections · fetched 2026-08-29 · 1b1efd93105f
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| fitzgen/bumpalo | main | 75 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem