Decision Workspace
rarena-allocator vs arena-b vs concurrent-slotmap
Side-by-side comparison of Rust crates
49
rarena-allocator
growingv0.6.0
Lock-free ARENA allocator which can be used in both memory and on-disk.
53
arena-b
growingv1.0.0
Production-grade bump allocator with lock-free, slab, and virtual-memory tooling for parsers, game engines, and request-scoped services
47
concurrent-slotmap
growingv0.2.0-alpha.1
A lock-free concurrent slotmap
Core Metrics
| rarena-allocator | arena-b | concurrent-slotmap | |
|---|---|---|---|
| Health Score | 49 | 53 | 47 |
| Total Downloads | 84.8K | 540 | 4.8K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 67 | 0 | 2 |
| Releases | 57 | 17 | 3 |
| Last Updated | 457d ago | 145d ago | 304d ago |
| Age | 1y 11m | 6m | 1y 8m |
Health Breakdown
rarena-allocator
Maintenance
8
Quality
9
Community
11
Popularity
6
Documentation
15
arena-b
Maintenance
12
Quality
19
Community
6
Popularity
3
Documentation
13
concurrent-slotmap
Maintenance
7
Quality
9
Community
12
Popularity
4
Documentation
15
Technical Details
| rarena-allocator | arena-b | concurrent-slotmap | |
|---|---|---|---|
| Version | 0.6.0 | 1.0.0 | 0.2.0-alpha.1 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 18 | 5 | 3 |
| Crate Size | 64KB | 67KB | 29KB |
| Features | 5 | 9 | 0 |
| Yanked % | 84.2% | 0.0% | 33.3% |
| Edition | 2024 | 2021 | 2021 |
| MSRV | 1.85.0 | — | 1.65 |
| Owners | 1 | 1 | 4 (team) |
Links
Quick Verdict
- •arena-b leads with a health score of 53/100, but none of the options score above 80.
- •rarena-allocator has the most downloads (84.8K), suggesting wider adoption.
- •⚠ rarena-allocator has not been updated in over a year.
- •rarena-allocator, concurrent-slotmap are pre-1.0 — API may change.