Decision Workspace
iter_tools vs former vs former_types
Side-by-side comparison of Rust crates
64
iter_tools
growingv0.50.0
Collection of general purpose tools to iterate. Currently it simply reexports itertools.
72
former
stablev2.51.1
A flexible implementation of the Builder pattern supporting nested builders and collection-specific subformers. Simplify the construction of complex objects.
72
former_types
stablev2.42.1
A flexible implementation of the Builder pattern supporting nested builders and collection-specific subformers. Its compile-time structures and traits that are not generated but reused.
Core Metrics
| iter_tools | former | former_types | |
|---|---|---|---|
| Health Score | 64 | 72 | 72 |
| Total Downloads | 600.6K | 234.0K | 70.0K |
| 30d Downloads | 15.2K | 6.8K | 6.4K |
| Dependents | 551 | 278 | 150 |
| Releases | 53 | 79 | 42 |
| Last Updated | 86d ago | 13d ago | 13d ago |
| Age | 4y 6m | 4y 7m | 2y 1m |
Health Breakdown
iter_tools
Maintenance
14
Quality
18
Community
12
Popularity
7
Documentation
13
former
Maintenance
18
Quality
22
Community
13
Popularity
6
Documentation
13
former_types
Maintenance
18
Quality
23
Community
12
Popularity
6
Documentation
13
Technical Details
| iter_tools | former | former_types | |
|---|---|---|---|
| Version | 0.50.0 | 2.51.1 | 2.42.1 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 3 | 6 | 3 |
| Crate Size | 23KB | 294KB | 42KB |
| Features | 7 | 10 | 6 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •former leads with a health score of 72/100, but none of the options score above 80.
- •iter_tools has the most downloads (600.6K), suggesting wider adoption.
- •iter_tools is depended on by 551 crates — strongest ecosystem trust.
- •iter_tools is pre-1.0 — API may change.