Decision Workspace
guardian vs saa vs async-mutex
Side-by-side comparison of Rust crates
56
guardian
growingv1.3.0
Provides owned mutex guards for refcounted mutexes.
64
saa
growingv5.5.0
Word-sized low-level synchronization primitives providing both asynchronous and synchronous interfaces.
63
async-mutex
growingv1.4.1
Async mutex
Core Metrics
| guardian | saa | async-mutex | |
|---|---|---|---|
| Health Score | 56 | 64 | 63 |
| Total Downloads | 1.5M | 789.7K | 15.7M |
| 30d Downloads | 211.0K | 263.4K | 293.8K |
| Dependents | 171 | 57 | 969 |
| Releases | 8 | 47 | 13 |
| Last Updated | 412d ago | 39d ago | 360d ago |
| Age | 9y 9m | 7m | 6y 10m |
Health Breakdown
guardian
Maintenance
5
Quality
21
Community
11
Popularity
7
Documentation
12
saa
Maintenance
17
Quality
14
Community
11
Popularity
7
Documentation
15
async-mutex
Maintenance
6
Quality
18
Community
19
Popularity
8
Documentation
12
Technical Details
| guardian | saa | async-mutex | |
|---|---|---|---|
| Version | 1.3.0 | 5.5.0 | 1.4.1 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✓ Yes |
| License | MIT OR Apache-2.0 | Apache-2.0 | Apache-2.0 OR MIT |
| Dependencies | 0 | 5 | 9 |
| Crate Size | 15KB | 42KB | 10KB |
| Features | 0 | 2 | 0 |
| Yanked % | 0.0% | 29.8% | 0.0% |
| Edition | 2021 | 2024 | 2018 |
| MSRV | 1.56.0 | 1.85.0 | — |
| Owners | 1 | 1 | 2 (team) |
Links
Quick Verdict
- •saa leads with a health score of 64/100, but none of the options score above 80.
- •async-mutex has the most downloads (15.7M), suggesting wider adoption.
- •async-mutex is depended on by 969 crates — strongest ecosystem trust.
- •⚠ guardian has not been updated in over a year.