Decision Workspace
fmap vs comp-cat-rs vs higher
Side-by-side comparison of Rust crates
47
fmap
growingv0.8.3
Functors in Rust
59
comp-cat-rs
experimentalv0.5.1
Computational category theory in Rust: all constructions as Kan extensions
49
higher
growingv0.2.0
Functors, Applicatives, Monads and other bad ideas
Core Metrics
| fmap | comp-cat-rs | higher | |
|---|---|---|---|
| Health Score | 47 | 59 | 49 |
| Total Downloads | 65.7K | 3.7K | 16.9K |
| 30d Downloads | 1.3K | 0 | 0 |
| Dependents | 4 | 203 | 12 |
| Releases | 23 | 8 | 3 |
| Last Updated | 1124d ago | 105d ago | 1272d ago |
| Age | 3y 1m | 3m | 7y 4m |
Health Breakdown
fmap
Maintenance
13
Quality
14
Community
4
Popularity
6
Documentation
10
comp-cat-rs
Maintenance
18
Quality
15
Community
12
Popularity
4
Documentation
10
higher
Maintenance
3
Quality
18
Community
8
Popularity
5
Documentation
15
Technical Details
| fmap | comp-cat-rs | higher | |
|---|---|---|---|
| Version | 0.8.3 | 0.5.1 | 0.2.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT | MPL-2.0+ |
| Dependencies | 1 | 0 | 2 |
| Crate Size | 12KB | 23KB | 12KB |
| Features | 0 | 0 | 5 |
| Yanked % | 4.3% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2021 |
| MSRV | — | — | 1.65 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •comp-cat-rs leads with a health score of 59/100, but none of the options score above 80.
- •fmap has the most downloads (65.7K), suggesting wider adoption.
- •comp-cat-rs is depended on by 203 crates — strongest ecosystem trust.
- •⚠ fmap, higher have not been updated in over a year.