Decision Workspace
fstr vs fixed_str vs cstr_core
Side-by-side comparison of Rust crates
67
fstr
growingv0.2.21
A stack-allocated fixed-length string type
45
fixed_str
growingv0.9.1
Fixed-size, null-padded UTF-8 string type with const-safe construction and binary serialization support.
56
cstr_core
growingv0.2.6
Implementation of CStr and CString for no_std environments.
Core Metrics
| fstr | fixed_str | cstr_core | |
|---|---|---|---|
| Health Score | 67 | 45 | 56 |
| Total Downloads | 353.3K | 1.8K | 3.1M |
| 30d Downloads | 23.6K | 0 | 63.8K |
| Dependents | 112 | 0 | 517 |
| Releases | 34 | 2 | 10 |
| Last Updated | 6d ago | 426d ago | 1406d ago |
| Age | 3y 6m | 1y 2m | 8y 7m |
Health Breakdown
fstr
Maintenance
19
Quality
14
Community
12
Popularity
7
Documentation
15
fixed_str
Maintenance
6
Quality
17
Community
6
Popularity
4
Documentation
12
cstr_core
Maintenance
5
Quality
18
Community
13
Popularity
8
Documentation
12
Technical Details
| fstr | fixed_str | cstr_core | |
|---|---|---|---|
| Version | 0.2.21 | 0.9.1 | 0.2.6 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | Apache-2.0 | MIT OR Apache-2.0 | Apache-2.0/MIT |
| Dependencies | 2 | 5 | 2 |
| Crate Size | 17KB | 27KB | 18KB |
| Features | 4 | 6 | 6 |
| Yanked % | 8.8% | 0.0% | 0.0% |
| Edition | 2024 | 2021 | 2018 |
| MSRV | 1.85 | 1.60 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •fstr leads with a health score of 67/100, but none of the options score above 80.
- •cstr_core has the most downloads (3.1M), suggesting wider adoption.
- •cstr_core is depended on by 517 crates — strongest ecosystem trust.
- •⚠ fixed_str, cstr_core have not been updated in over a year.