Decision Workspace
heap_arr vs arrayvec vs uluru
Side-by-side comparison of Rust crates
51
heap_arr
growingv0.4.0
Allocate fixed-size arrays directly on the heap, bypassing stack allocation limits
64
arrayvec
growingv0.7.6
A vector with fixed capacity, backed by an array (it can be stored on the stack too). Implements fixed capacity ArrayVec and ArrayString.
61
uluru
growingv3.1.0
A simple, fast, LRU cache implementation
Core Metrics
| heap_arr | arrayvec | uluru | |
|---|---|---|---|
| Health Score | 51 | 64 | 61 |
| Total Downloads | 4.0K | 362.1M | 17.4M |
| 30d Downloads | 17 | 23.0M | 1.3M |
| Dependents | 0 | 16.0K | 640 |
| Releases | 4 | 55 | 13 |
| Last Updated | 6d ago | 587d ago | 719d ago |
| Age | 2y 4m | 10y 10m | 8y 4m |
Health Breakdown
heap_arr
Maintenance
16
Quality
16
Community
5
Popularity
4
Documentation
10
arrayvec
Maintenance
6
Quality
16
Community
20
Popularity
8
Documentation
14
uluru
Maintenance
4
Quality
20
Community
19
Popularity
8
Documentation
10
Technical Details
| heap_arr | arrayvec | uluru | |
|---|---|---|---|
| Version | 0.4.0 | 0.7.6 | 3.1.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | MIT OR Apache-2.0 | MPL-2.0 |
| Dependencies | 0 | 6 | 1 |
| Crate Size | 5KB | 31KB | 10KB |
| Features | 0 | 2 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2018 | 2021 |
| MSRV | — | 1.51 | — |
| Owners | 1 | 2 (team) | 2 (team) |
Links
Quick Verdict
- •arrayvec leads with a health score of 64/100, but none of the options score above 80.
- •arrayvec is depended on by 16.0K crates — strongest ecosystem trust.
- •⚠ arrayvec, uluru have not been updated in over a year.
- •heap_arr, arrayvec are pre-1.0 — API may change.