Decision Workspace
hashmap-mem vs kevy-hash vs maplit
Side-by-side comparison of Rust crates
53
hashmap-mem
growingv0.2.2
Fast, low-overhead in-memory hashmap implementation optimized for performance using fxhash
67
kevy-hash
experimentalv3.18.0
FxHash + fmix64 hasher for single-trust-domain keyspaces.
63
maplit
growingv1.0.2
Collection “literal” macros for HashMap, HashSet, BTreeMap, and BTreeSet.
Core Metrics
| hashmap-mem | kevy-hash | maplit | |
|---|---|---|---|
| Health Score | 53 | 67 | 63 |
| Total Downloads | 5.8K | 4.7K | 118.5M |
| 30d Downloads | 0 | 2.7K | 2.9M |
| Dependents | 85 | 418 | 16.5K |
| Releases | 4 | 78 | 10 |
| Last Updated | 174d ago | 3d ago | 2515d ago |
| Age | 1y | 1m | 11y 2m |
Health Breakdown
hashmap-mem
Maintenance
13
Quality
15
Community
11
Popularity
4
Documentation
10
kevy-hash
Maintenance
17
Quality
18
Community
13
Popularity
4
Documentation
15
maplit
Maintenance
4
Quality
21
Community
19
Popularity
8
Documentation
11
Technical Details
| hashmap-mem | kevy-hash | maplit | |
|---|---|---|---|
| Version | 0.2.2 | 3.18.0 | 1.0.2 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | Apache-2.0 OR MIT | MIT/Apache-2.0 |
| Dependencies | 1 | 0 | 0 |
| Crate Size | 8KB | 15KB | 9KB |
| Features | 0 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | — |
| MSRV | — | 1.97.0 | — |
| Owners | 1 | 1 | 2 (team) |
Links
Quick Verdict
- •kevy-hash leads with a health score of 67/100, but none of the options score above 80.
- •maplit has the most downloads (118.5M), suggesting wider adoption.
- •maplit is depended on by 16.5K crates — strongest ecosystem trust.
- •⚠ maplit has not been updated in over a year.
- •hashmap-mem is pre-1.0 — API may change.