Decision Workspace
reusable-vec vs hashmap-mem vs fastalloc
Side-by-side comparison of Rust crates
33
reusable-vec
growingv0.1.2
A Vec wrapper that allows reusing contained values
56
hashmap-mem
experimentalv0.2.2
Fast, low-overhead in-memory hashmap implementation optimized for performance using fxhash
55
fastalloc
experimentalv1.5.0
High-performance memory pooling library with type-safe handles, predictable latency, and zero fragmentation. Perfect for game engines, real-time systems, and high-churn workloads.
Core Metrics
| reusable-vec | hashmap-mem | fastalloc | |
|---|---|---|---|
| Health Score | 33 | 56 | 55 |
| Total Downloads | 3.7K | 4.9K | 638 |
| 30d Downloads | 3 | 244 | 6 |
| Dependents | 0 | 85 | 0 |
| Releases | 3 | 4 | 4 |
| Last Updated | 1140d ago | 66d ago | 148d ago |
| Age | 3y 1m | 9m | 5m |
Health Breakdown
reusable-vec
Maintenance
4
Quality
10
Community
5
Popularity
4
Documentation
10
hashmap-mem
Maintenance
17
Quality
14
Community
11
Popularity
4
Documentation
10
fastalloc
Maintenance
12
Quality
19
Community
6
Popularity
3
Documentation
15
Technical Details
| reusable-vec | hashmap-mem | fastalloc | |
|---|---|---|---|
| Version | 0.1.2 | 0.2.2 | 1.5.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 0 | 1 | 7 |
| Crate Size | 2KB | 8KB | 83KB |
| Features | 0 | 0 | 8 |
| Yanked % | 66.7% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2021 |
| MSRV | — | — | 1.70.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •hashmap-mem leads with a health score of 56/100, but none of the options score above 80.
- •⚠ reusable-vec has not been updated in over a year.
- •reusable-vec, hashmap-mem are pre-1.0 — API may change.