Decision Workspace
shared_hashmap vs shm-primitives vs bcast
Side-by-side comparison of Rust crates
43
shared_hashmap
growingv0.1.2
A shared hashmap for use between processes, using shared memory
63
shm-primitives
experimentalv7.3.0
Lock-free primitives for shared memory IPC: BipBuffer, slot metadata, and OS-level doorbell/mmap
59
bcast
growingv0.0.28
Low latency broadcast (SPMC) buffer designed to work with shared memory.
Core Metrics
| shared_hashmap | shm-primitives | bcast | |
|---|---|---|---|
| Health Score | 43 | 63 | 59 |
| Total Downloads | 4.5K | 931 | 18.2K |
| 30d Downloads | 93 | 387 | 169 |
| Dependents | 68 | 18 | 0 |
| Releases | 3 | 11 | 28 |
| Last Updated | 906d ago | 4d ago | 23d ago |
| Age | 2y 9m | 3m | 1y 4m |
Health Breakdown
shared_hashmap
Maintenance
5
Quality
14
Community
10
Popularity
4
Documentation
10
shm-primitives
Maintenance
19
Quality
16
Community
9
Popularity
4
Documentation
15
bcast
Maintenance
18
Quality
15
Community
6
Popularity
5
Documentation
15
Technical Details
| shared_hashmap | shm-primitives | bcast | |
|---|---|---|---|
| Version | 0.1.2 | 7.3.0 | 0.0.28 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT |
| Dependencies | 5 | 4 | 9 |
| Crate Size | 7KB | 39KB | 22KB |
| Features | 0 | 1 | 2 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2024 |
| MSRV | — | 1.91 | 1.88.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •shm-primitives leads with a health score of 63/100, but none of the options score above 80.
- •bcast has the most downloads (18.2K), suggesting wider adoption.
- •⚠ shared_hashmap has not been updated in over a year.
- •shared_hashmap, bcast are pre-1.0 — API may change.