Decision Workspace
slice vs async-fs vs memmap2
Side-by-side comparison of Rust crates
48
slice
growingv0.0.4
slices for streams implementing `std::io::read` and `std::io::write`.
68
async-fs
growingv2.2.0
Async filesystem primitives
62
memmap2
growingv0.9.10
Cross-platform Rust API for memory-mapped file IO
Core Metrics
| slice | async-fs | memmap2 | |
|---|---|---|---|
| Health Score | 48 | 68 | 62 |
| Total Downloads | 104.3K | 44.7M | 260.5M |
| 30d Downloads | 0 | 3.1M | 19.9M |
| Dependents | 32 | 1.2K | 19.0K |
| Releases | 4 | 18 | 35 |
| Last Updated | 2866d ago | 271d ago | 117d ago |
| Age | 9y 1m | 7y 1m | 6y 4m |
Health Breakdown
slice
Maintenance
6
Quality
16
Community
9
Popularity
6
Documentation
11
async-fs
Maintenance
7
Quality
19
Community
19
Popularity
8
Documentation
15
memmap2
Maintenance
12
Quality
11
Community
16
Popularity
8
Documentation
15
Technical Details
| slice | async-fs | memmap2 | |
|---|---|---|---|
| Version | 0.0.4 | 2.2.0 | 0.9.10 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | MIT/Apache-2.0 | Apache-2.0 OR MIT | MIT OR Apache-2.0 |
| Dependencies | 0 | 5 | 4 |
| Crate Size | 3KB | 19KB | 35KB |
| Features | 0 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 5.7% |
| Edition | — | 2021 | 2021 |
| MSRV | — | 1.71 | 1.63 |
| Owners | 1 | 1 (team) | 4 |
Links
Quick Verdict
- •async-fs leads with a health score of 68/100, but none of the options score above 80.
- •memmap2 has the most downloads (260.5M), suggesting wider adoption.
- •memmap2 is depended on by 19.0K crates — strongest ecosystem trust.
- •⚠ slice has not been updated in over a year.
- •slice, memmap2 are pre-1.0 — API may change.