Decision Workspace
async-lazy vs async-once-cell vs once_cell
Side-by-side comparison of Rust crates
49
async-lazy
growingv0.1.2
A value which is initialized on the first access, with an async function.
58
async-once-cell
growingv0.5.4
Async single assignment cells and lazy values.
75
once_cell
stablev1.21.4
Single assignment cells and lazy values.
Core Metrics
| async-lazy | async-once-cell | once_cell | |
|---|---|---|---|
| Health Score | 49 | 58 | 75 |
| Total Downloads | 28.5K | 5.3M | 782.7M |
| 30d Downloads | 919 | 507.2K | 52.5M |
| Dependents | 62 | 923 | 162.5K |
| Releases | 3 | 14 | 67 |
| Last Updated | 397d ago | 537d ago | 15d ago |
| Age | 2y 10m | 4y 7m | 7y 8m |
Health Breakdown
async-lazy
Maintenance
6
Quality
17
Community
11
Popularity
5
Documentation
10
async-once-cell
Maintenance
7
Quality
17
Community
14
Popularity
8
Documentation
12
once_cell
Maintenance
18
Quality
18
Community
16
Popularity
8
Documentation
15
Technical Details
| async-lazy | async-once-cell | once_cell | |
|---|---|---|---|
| Version | 0.1.2 | 0.5.4 | 1.21.4 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 3 | 1 | 5 |
| Crate Size | 15KB | 20KB | 35KB |
| Features | 2 | 2 | 9 |
| Yanked % | 0.0% | 0.0% | 11.9% |
| Edition | 2021 | 2018 | 2021 |
| MSRV | — | — | 1.65 |
| Owners | 1 | 1 | 2 |
Links
Quick Verdict
- •once_cell leads with a health score of 75/100, but none of the options score above 80.
- •once_cell is depended on by 162.5K crates — strongest ecosystem trust.
- •⚠ async-lazy, async-once-cell have not been updated in over a year.
- •async-lazy, async-once-cell are pre-1.0 — API may change.