Decision Workspace
chachacha vs c2-chacha vs simsimd
Side-by-side comparison of Rust crates
54
chachacha
experimentalv0.4.2
SIMD optimized implementations of the Chacha stream cipher
57
c2-chacha
growingv0.3.3
The ChaCha family of stream ciphers
74
simsimd
stablev6.5.16
Portable mixed-precision BLAS-like vector math library for x86 and ARM
Core Metrics
| chachacha | c2-chacha | simsimd | |
|---|---|---|---|
| Health Score | 54 | 57 | 74 |
| Total Downloads | 5.9K | 13.1M | 771.2K |
| 30d Downloads | 81 | 373.3K | 157.5K |
| Dependents | 10 | 180 | 309 |
| Releases | 10 | 10 | 104 |
| Last Updated | 209d ago | 1615d ago | 20d ago |
| Age | 11m | 7y 1m | 2y 2m |
Health Breakdown
chachacha
Maintenance
11
Quality
14
Community
9
Popularity
5
Documentation
15
c2-chacha
Maintenance
7
Quality
18
Community
12
Popularity
8
Documentation
12
simsimd
Maintenance
18
Quality
19
Community
15
Popularity
7
Documentation
15
Technical Details
| chachacha | c2-chacha | simsimd | |
|---|---|---|---|
| Version | 0.4.2 | 0.3.3 | 6.5.16 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | MIT/Apache-2.0 | Apache-2.0 |
| Dependencies | 2 | 3 | 4 |
| Crate Size | 21KB | 14KB | 126KB |
| Features | 0 | 5 | 2 |
| Yanked % | 0.0% | 0.0% | 2.9% |
| Edition | 2024 | 2018 | 2021 |
| MSRV | 1.89 | — | 1.64 |
| Owners | 1 | 1 | 2 |
Links
Quick Verdict
- •simsimd leads with a health score of 74/100, but none of the options score above 80.
- •c2-chacha has the most downloads (13.1M), suggesting wider adoption.
- •simsimd is depended on by 309 crates — strongest ecosystem trust.
- •⚠ c2-chacha has not been updated in over a year.
- •chachacha, c2-chacha are pre-1.0 — API may change.