Decision Workspace
dync vs dync-derive vs downcast-rs
Side-by-side comparison of Rust crates
44
dync
growingv0.6.0
An efficient alternative to `dyn Trait` for containerized types
39
dync-derive
growingv0.4.0
Attribute macros for producing `dync` compatible traits
65
downcast-rs
growingv2.0.2
Trait object downcasting support using only safe Rust. It supports type parameters, associated types, and type constraints.
Core Metrics
| dync | dync-derive | downcast-rs | |
|---|---|---|---|
| Health Score | 44 | 39 | 65 |
| Total Downloads | 257.5K | 242.3K | 102.2M |
| 30d Downloads | 43.1K | 43.1K | 7.2M |
| Dependents | 20 | 15 | 4.4K |
| Releases | 15 | 3 | 15 |
| Last Updated | 345d ago | 2131d ago | 207d ago |
| Age | 5y 10m | 5y 10m | 10y 3m |
Health Breakdown
dync
Maintenance
6
Quality
16
Community
7
Popularity
6
Documentation
9
dync-derive
Maintenance
4
Quality
14
Community
6
Popularity
6
Documentation
9
downcast-rs
Maintenance
8
Quality
23
Community
14
Popularity
8
Documentation
12
Technical Details
| dync | dync-derive | downcast-rs | |
|---|---|---|---|
| Version | 0.6.0 | 0.4.0 | 2.0.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 5 | 5 | 0 |
| Crate Size | 60KB | 9KB | 13KB |
| Features | 3 | 0 | 3 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2018 | 2018 | 2021 |
| MSRV | — | — | 1.56 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •downcast-rs leads with a health score of 65/100, but none of the options score above 80.
- •downcast-rs is depended on by 4.4K crates — strongest ecosystem trust.
- •⚠ dync-derive has not been updated in over a year.
- •dync, dync-derive are pre-1.0 — API may change.