Decision Workspace
serdect vs subtle vs cmov
Side-by-side comparison of Rust crates
64
serdect
growingv0.4.2
Constant-time serde serializer/deserializer helpers for data that potentially contains secrets (e.g. cryptographic keys)
63
subtle
growingv2.6.1
Pure-Rust traits and utilities for constant-time cryptographic implementations.
62
cmov
growingv0.5.2
Conditional move CPU intrinsics which are guaranteed on major platforms (ARM32/ARM64, x86/x86_64, RISC-V) to execute in constant-time and not be rewritten as branches by the compiler. Provides wrappers for the CMOV family of instructions on x86/x86_64 and CSEL on AArch64, along with a portable "best-effort" pure Rust fallback implementation.
Core Metrics
| serdect | subtle | cmov | |
|---|---|---|---|
| Health Score | 64 | 63 | 62 |
| Total Downloads | 21.0M | 420.5M | 2.5M |
| 30d Downloads | 2.8M | 33.7M | 860.8K |
| Dependents | 779 | 10.5K | 54 |
| Releases | 8 | 29 | 19 |
| Last Updated | 83d ago | 641d ago | 66d ago |
| Age | 3y 12m | 8y 10m | 4y 1m |
Health Breakdown
serdect
Maintenance
14
Quality
11
Community
19
Popularity
8
Documentation
12
subtle
Maintenance
6
Quality
17
Community
20
Popularity
8
Documentation
12
cmov
Maintenance
14
Quality
9
Community
16
Popularity
8
Documentation
15
Technical Details
| serdect | subtle | cmov | |
|---|---|---|---|
| Version | 0.4.2 | 2.6.1 | 0.5.2 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | Apache-2.0 OR MIT | BSD-3-Clause | Apache-2.0 OR MIT |
| Dependencies | 12 | 1 | 1 |
| Crate Size | 19KB | 15KB | 24KB |
| Features | 3 | 6 | 0 |
| Yanked % | 12.5% | 58.6% | 63.2% |
| Edition | 2024 | 2018 | 2024 |
| MSRV | 1.85 | — | 1.85 |
| Owners | 2 (team) | 2 (team) | 2 (team) |
Links
Quick Verdict
- •serdect leads with a health score of 64/100, but none of the options score above 80.
- •subtle has the most downloads (420.5M), suggesting wider adoption.
- •subtle is depended on by 10.5K crates — strongest ecosystem trust.
- •⚠ subtle has not been updated in over a year.
- •serdect, cmov are pre-1.0 — API may change.