Decision Workspace
shipper-retry vs chrono-machines vs mailrs-backoff
Side-by-side comparison of Rust crates
51
shipper-retry
experimentalv0.4.0
Retry strategies and backoff policies for shipper
60
chrono-machines
experimentalv0.4.0
Exponential, constant, and Fibonacci backoff retry library with full jitter support - no_std compatible
52
mailrs-backoff
experimentalv1.0.1
Exponential backoff with optional jitter (AWS-style taxonomy: None / Equal / Full). Pure delay math — no I/O, no async, no allocation. Useful for any retry loop: SMTP outbound, webhook delivery, auth-lockout, HTTP client retries.
Core Metrics
| shipper-retry | chrono-machines | mailrs-backoff | |
|---|---|---|---|
| Health Score | 51 | 60 | 52 |
| Total Downloads | 284 | 4.6K | 690 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 11 | 65 | 7 |
| Releases | 3 | 7 | 2 |
| Last Updated | 54d ago | 19d ago | 51d ago |
| Age | 2m | 9m | 1m |
Health Breakdown
shipper-retry
Maintenance
11
Quality
13
Community
9
Popularity
3
Documentation
15
chrono-machines
Maintenance
19
Quality
16
Community
11
Popularity
4
Documentation
10
mailrs-backoff
Maintenance
11
Quality
17
Community
8
Popularity
3
Documentation
13
Technical Details
| shipper-retry | chrono-machines | mailrs-backoff | |
|---|---|---|---|
| Version | 0.4.0 | 0.4.0 | 1.0.1 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT OR Apache-2.0 | MIT | Apache-2.0 OR MIT |
| Dependencies | 5 | 3 | 2 |
| Crate Size | 18KB | 21KB | 18KB |
| Features | 0 | 4 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2024 |
| MSRV | 1.95 | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •chrono-machines leads with a health score of 60/100, but none of the options score above 80.
- •shipper-retry, chrono-machines are pre-1.0 — API may change.