Decision Workspace
fddf vs async-dup vs fs4
Side-by-side comparison of Rust crates
38
fddf
growingv1.7.0
Fast, parallelized duplicate file finder.
60
async-dup
growingv1.2.4
Duplicate an async I/O handle
58
fs4
growingv0.13.1
No libc, pure Rust cross-platform file locks. Original fs2, now supports async and replace libc by rustix.
Core Metrics
| fddf | async-dup | fs4 | |
|---|---|---|---|
| Health Score | 38 | 60 | 58 |
| Total Downloads | 18.6K | 5.4M | 36.1M |
| 30d Downloads | 19 | 167.9K | 3.3M |
| Dependents | 0 | 734 | 1.7K |
| Releases | 11 | 9 | 28 |
| Last Updated | 2175d ago | 846d ago | 384d ago |
| Age | 8y 9m | 5y 10m | 4y 2m |
Health Breakdown
fddf
Maintenance
4
Quality
18
Community
2
Popularity
5
Documentation
9
async-dup
Maintenance
4
Quality
15
Community
19
Popularity
8
Documentation
14
fs4
Maintenance
8
Quality
12
Community
15
Popularity
8
Documentation
15
Technical Details
| fddf | async-dup | fs4 | |
|---|---|---|---|
| Version | 1.7.0 | 1.2.4 | 0.13.1 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✗ No |
| License | MIT/Apache-2.0 | Apache-2.0 OR MIT | MIT OR Apache-2.0 |
| Dependencies | 9 | 4 | 14 |
| Crate Size | 14KB | 9KB | 29KB |
| Features | 0 | 0 | 9 |
| Yanked % | 0.0% | 11.1% | 14.3% |
| Edition | 2018 | 2018 | 2021 |
| MSRV | — | 1.59 | 1.75.0 |
| Owners | 1 | 1 (team) | 1 |
Links
Quick Verdict
- •async-dup leads with a health score of 60/100, but none of the options score above 80.
- •fs4 has the most downloads (36.1M), suggesting wider adoption.
- •fs4 is depended on by 1.7K crates — strongest ecosystem trust.
- •⚠ fddf, async-dup, fs4 have not been updated in over a year.
- •fs4 is pre-1.0 — API may change.