Decision Workspace
lambda_calc vs clap_builder vs clap
Side-by-side comparison of Rust crates
44
lambda_calc
growingv2.2.2
A command-line untyped lambda calculus interpreter.
77
clap_builder
stablev4.6.0
A simple to use, efficient, and full-featured Command Line Argument Parser
74
clap
stablev4.6.0
A simple to use, efficient, and full-featured Command Line Argument Parser
Core Metrics
| lambda_calc | clap_builder | clap | |
|---|---|---|---|
| Health Score | 44 | 77 | 74 |
| Total Downloads | 9.6K | 420.4M | 735.7M |
| 30d Downloads | 10 | 37.4M | 47.8M |
| Dependents | 0 | 390 | 312.6K |
| Releases | 7 | 105 | 455 |
| Last Updated | 2112d ago | 15d ago | 15d ago |
| Age | 6y 5m | 3y | 11y 1m |
Health Breakdown
lambda_calc
Maintenance
4
Quality
20
Community
3
Popularity
5
Documentation
12
clap_builder
Maintenance
19
Quality
21
Community
17
Popularity
8
Documentation
12
clap
Maintenance
18
Quality
17
Community
19
Popularity
8
Documentation
12
Technical Details
| lambda_calc | clap_builder | clap | |
|---|---|---|---|
| Version | 2.2.2 | 4.6.0 | 4.6.0 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✓ Yes |
| License | MIT | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 3 | 12 | 11 |
| Crate Size | 74KB | 171KB | 63KB |
| Features | 0 | 18 | 21 |
| Yanked % | 0.0% | 0.0% | 20.2% |
| Edition | 2018 | 2024 | 2024 |
| MSRV | — | 1.85 | 1.85 |
| Owners | 1 | 3 (team) | 3 (team) |
Links
Quick Verdict
- •clap_builder leads with a health score of 77/100, but none of the options score above 80.
- •clap has the most downloads (735.7M), suggesting wider adoption.
- •clap is depended on by 312.6K crates — strongest ecosystem trust.
- •⚠ lambda_calc has not been updated in over a year.