Decision Workspace
cargo-mutants vs cargo-llvm-cov vs cargo-crappy
Side-by-side comparison of Rust crates
58
cargo-mutants
stablev27.1.0
Inject bugs and see if your tests catch them
58
cargo-llvm-cov
growingv0.8.7
Cargo subcommand to easily use LLVM source-based code coverage (-C instrument-coverage).
45
cargo-crappy
experimentalv0.1.2
CRAP metric analysis for Rust — clippy-style diagnostics for change-risk, complexity, coverage, and idiomatic code
Core Metrics
| cargo-mutants | cargo-llvm-cov | cargo-crappy | |
|---|---|---|---|
| Health Score | 58 | 58 | 45 |
| Total Downloads | 392.9K | 6.5M | 53 |
| 30d Downloads | 34.6K | 275.5K | 0 |
| Dependents | 6 | 300 | 0 |
| Releases | 71 | 122 | 3 |
| Last Updated | 41d ago | 62d ago | 51d ago |
| Age | 4y 8m | 5y 5m | 1m |
Health Breakdown
cargo-mutants
Maintenance
17
Quality
15
Community
7
Popularity
7
Documentation
12
cargo-llvm-cov
Maintenance
15
Quality
10
Community
13
Popularity
8
Documentation
12
cargo-crappy
Maintenance
11
Quality
14
Community
6
Popularity
2
Documentation
12
Technical Details
| cargo-mutants | cargo-llvm-cov | cargo-crappy | |
|---|---|---|---|
| Version | 27.1.0 | 0.8.7 | 0.1.2 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | MIT | Apache-2.0 OR MIT | MIT |
| Dependencies | 49 | 22 | 3 |
| Crate Size | 244KB | 106KB | 30KB |
| Features | 0 | 0 | 0 |
| Yanked % | 0.0% | 2.5% | 0.0% |
| Edition | 2024 | 2021 | 2024 |
| MSRV | 1.88 | 1.87 | 1.85 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •cargo-mutants leads with a health score of 58/100, but none of the options score above 80.
- •cargo-llvm-cov has the most downloads (6.5M), suggesting wider adoption.
- •cargo-llvm-cov is depended on by 300 crates — strongest ecosystem trust.
- •cargo-llvm-cov, cargo-crappy are pre-1.0 — API may change.