Decision Workspace
as_repr vs zerocopy vs usize_cast
Side-by-side comparison of Rust crates
59
as_repr
experimentalv1.3.0
Rust trait for constant `#[repr(T)]` conversions
64
zerocopy
growingv0.8.47
Zerocopy makes zero-cost memory manipulation effortless. We write "unsafe" so you don't have to.
50
usize_cast
growingv1.1.0
Compile time checked cast from and to `usize`/`isize`
Core Metrics
| as_repr | zerocopy | usize_cast | |
|---|---|---|---|
| Health Score | 59 | 64 | 50 |
| Total Downloads | 6.0K | 491.0M | 150.4K |
| 30d Downloads | 60 | 47.5M | 4.0K |
| Dependents | 6 | 6.9K | 6 |
| Releases | 5 | 157 | 2 |
| Last Updated | 83d ago | 8d ago | 2189d ago |
| Age | 5m | 7y 7m | 6y |
Health Breakdown
as_repr
Maintenance
13
Quality
18
Community
8
Popularity
5
Documentation
15
zerocopy
Maintenance
18
Quality
9
Community
17
Popularity
8
Documentation
12
usize_cast
Maintenance
3
Quality
21
Community
8
Popularity
6
Documentation
12
Technical Details
| as_repr | zerocopy | usize_cast | |
|---|---|---|---|
| Version | 1.3.0 | 0.8.47 | 1.1.0 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✓ Yes |
| License | Apache-2.0 OR BSL-1.0 OR MIT | BSD-2-Clause OR Apache-2.0 OR MIT | MIT OR Apache-2.0 |
| Dependencies | 0 | 8 | 0 |
| Crate Size | 8KB | 281KB | 3KB |
| Features | 0 | 7 | 0 |
| Yanked % | 0.0% | 36.3% | 0.0% |
| Edition | 2024 | 2021 | 2018 |
| MSRV | 1.85 | 1.56.0 | — |
| Owners | 1 | 2 | 1 |
Links
Quick Verdict
- •zerocopy leads with a health score of 64/100, but none of the options score above 80.
- •zerocopy is depended on by 6.9K crates — strongest ecosystem trust.
- •⚠ usize_cast has not been updated in over a year.
- •zerocopy is pre-1.0 — API may change.