Decision Workspace
postings vs simsimd vs memchr
Side-by-side comparison of Rust crates
54
postings
experimentalv0.1.2
Inverted-index postings lists with segment-style updates. Supports u32 TF (classical) and f32 weights (SPLADE/learned sparse).
74
simsimd
stablev6.5.16
Portable mixed-precision BLAS-like vector math library for x86 and ARM
72
memchr
stablev2.8.0
Provides extremely fast (uses SIMD on x86_64, aarch64 and wasm32) routines for 1, 2 or 3 byte search and single substring search.
Core Metrics
| postings | simsimd | memchr | |
|---|---|---|---|
| Health Score | 54 | 74 | 72 |
| Total Downloads | 103 | 771.2K | 842.6M |
| 30d Downloads | 88 | 151.9K | 58.6M |
| Dependents | 8 | 309 | 17.1K |
| Releases | 3 | 104 | 44 |
| Last Updated | 10d ago | 20d ago | 49d ago |
| Age | 1m | 2y 2m | 10y 9m |
Health Breakdown
postings
Maintenance
13
Quality
15
Community
9
Popularity
2
Documentation
15
simsimd
Maintenance
18
Quality
19
Community
15
Popularity
7
Documentation
15
memchr
Maintenance
15
Quality
22
Community
12
Popularity
8
Documentation
15
Technical Details
| postings | simsimd | memchr | |
|---|---|---|---|
| Version | 0.1.2 | 6.5.16 | 2.8.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT OR Apache-2.0 | Apache-2.0 | Unlicense OR MIT |
| Dependencies | 10 | 4 | 3 |
| Crate Size | 30KB | 126KB | 98KB |
| Features | 6 | 2 | 7 |
| Yanked % | 0.0% | 2.9% | 2.3% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | 1.80 | 1.64 | 1.61 |
| Owners | 1 | 2 | 1 |
Links
Quick Verdict
- •simsimd leads with a health score of 74/100, but none of the options score above 80.
- •memchr has the most downloads (842.6M), suggesting wider adoption.
- •memchr is depended on by 17.1K crates — strongest ecosystem trust.
- •postings is pre-1.0 — API may change.