Decision Workspace
hashmap-mem vs maplit vs keyed-set
Side-by-side comparison of Rust crates
56
hashmap-mem
experimentalv0.2.2
Fast, low-overhead in-memory hashmap implementation optimized for performance using fxhash
63
maplit
growingv1.0.2
Collection “literal” macros for HashMap, HashSet, BTreeMap, and BTreeSet.
57
keyed-set
growingv1.1.0
Keyed Set: a hashbrown-based HashSet that indexes based on projections of its elements.
Core Metrics
| hashmap-mem | maplit | keyed-set | |
|---|---|---|---|
| Health Score | 56 | 63 | 57 |
| Total Downloads | 4.9K | 101.1M | 2.2M |
| 30d Downloads | 244 | 4.6M | 191.4K |
| Dependents | 85 | 15.7K | 46 |
| Releases | 4 | 10 | 11 |
| Last Updated | 66d ago | 2407d ago | 205d ago |
| Age | 9m | 10y 10m | 3y 4m |
Health Breakdown
hashmap-mem
Maintenance
17
Quality
14
Community
11
Popularity
4
Documentation
10
maplit
Maintenance
4
Quality
21
Community
19
Popularity
8
Documentation
11
keyed-set
Maintenance
10
Quality
20
Community
9
Popularity
8
Documentation
10
Technical Details
| hashmap-mem | maplit | keyed-set | |
|---|---|---|---|
| Version | 0.2.2 | 1.0.2 | 1.1.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT/Apache-2.0 | EPL-2.0 OR Apache-2.0 |
| Dependencies | 1 | 0 | 1 |
| Crate Size | 8KB | 9KB | 6KB |
| Features | 0 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | — | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 2 (team) | 1 |
Links
Quick Verdict
- •maplit leads with a health score of 63/100, but none of the options score above 80.
- •maplit is depended on by 15.7K crates — strongest ecosystem trust.
- •⚠ maplit has not been updated in over a year.
- •hashmap-mem is pre-1.0 — API may change.