Decision Workspace
lethe-core-rust vs nvs-core vs bm25x
Side-by-side comparison of Rust crates
42
lethe-core-rust
experimentalv0.1.1
High-performance hybrid retrieval engine combining BM25 lexical search with vector similarity using z-score fusion. Features hero configuration for optimal parity with splade baseline, gamma boosting for code/error contexts, and comprehensive chunking pipeline.
36
nvs-core
experimentalv0.1.0
Native Vector Store (Rust) core: bundle format, mmap reader, vector/BM25/hybrid search
49
bm25x
experimentalv0.3.1
A fast, streaming-friendly BM25 search engine with mmap support
Core Metrics
| lethe-core-rust | nvs-core | bm25x | |
|---|---|---|---|
| Health Score | 42 | 36 | 49 |
| Total Downloads | 699 | 453 | 77 |
| 30d Downloads | 4 | 25 | 77 |
| Dependents | 0 | 1 | 0 |
| Releases | 2 | 1 | 6 |
| Last Updated | 194d ago | 184d ago | 9d ago |
| Age | 6m | 6m | 9d |
Health Breakdown
lethe-core-rust
Maintenance
9
Quality
11
Community
6
Popularity
3
Documentation
13
nvs-core
Maintenance
5
Quality
11
Community
7
Popularity
3
Documentation
10
bm25x
Maintenance
18
Quality
13
Community
6
Popularity
2
Documentation
10
Technical Details
| lethe-core-rust | nvs-core | bm25x | |
|---|---|---|---|
| Version | 0.1.1 | 0.1.0 | 0.3.1 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | Apache-2.0 |
| Dependencies | 19 | 18 | 9 |
| Crate Size | 1.2MB | 38KB | 264KB |
| Features | 4 | 0 | 2 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •bm25x leads with a health score of 49/100, but none of the options score above 80.
- •lethe-core-rust has the most downloads (699), suggesting wider adoption.