Decision Workspace
async-fetcher vs down vs par_io
Side-by-side comparison of Rust crates
42
async-fetcher
growingv0.12.0
Asynchronous multi-connection multi-download resumable HTTP file fetching state machine
43
down
experimentalv0.1.5
Multi-source parallel download with automatic failover / 多源并行下载与自动故障转移
42
par_io
growingv0.4.2
Parallel, async file I/O library with control over memory usage with no dependencies.
Core Metrics
| async-fetcher | down | par_io | |
|---|---|---|---|
| Health Score | 42 | 43 | 42 |
| Total Downloads | 33.9K | 1.6K | 3.9K |
| 30d Downloads | 137 | 26 | 5 |
| Dependents | 10 | 9 | 0 |
| Releases | 23 | 5 | 3 |
| Last Updated | 191d ago | 109d ago | 1014d ago |
| Age | 7y 4m | 9m | 3y 10m |
Health Breakdown
async-fetcher
Maintenance
10
Quality
6
Community
11
Popularity
5
Documentation
10
down
Maintenance
12
Quality
13
Community
6
Popularity
4
Documentation
8
par_io
Maintenance
4
Quality
16
Community
3
Popularity
4
Documentation
15
Technical Details
| async-fetcher | down | par_io | |
|---|---|---|---|
| Version | 0.12.0 | 0.1.5 | 0.4.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MPL-2.0 | MulanPSL-2.0 | BSD-3-Clause |
| Dependencies | 19 | 13 | 0 |
| Crate Size | 32KB | 28KB | 12KB |
| Features | 0 | 1 | 0 |
| Yanked % | 34.8% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2021 |
| MSRV | — | — | 1.60 |
| Owners | 2 | 1 | 1 |
Links
Quick Verdict
- •down leads with a health score of 43/100, but none of the options score above 80.
- •async-fetcher has the most downloads (33.9K), suggesting wider adoption.
- •⚠ par_io has not been updated in over a year.