Decision Workspace
kalk vs mathexpr vs expr-solver-lib
Side-by-side comparison of Rust crates
66
kalk
stablev3.2.3
A math evaluator library that supports user-defined functions, variables and units, and can handle fairly ambiguous syntax.
51
mathexpr
experimentalv0.1.1
A fast, safe mathematical expression parser and evaluator with bytecode compilation
48
expr-solver-lib
growingv1.2.0
Mathematical expression evaluator with bytecode compilation and configurable numeric precision (f64 or 128-bit Decimal)
Core Metrics
| kalk | mathexpr | expr-solver-lib | |
|---|---|---|---|
| Health Score | 66 | 51 | 48 |
| Total Downloads | 68.6K | 1.2K | 1.6K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 45 | 3 | 7 |
| Releases | 46 | 2 | 7 |
| Last Updated | 3d ago | 191d ago | 265d ago |
| Age | 6y 1m | 6m | 8m |
Health Breakdown
kalk
Maintenance
19
Quality
21
Community
11
Popularity
6
Documentation
9
mathexpr
Maintenance
9
Quality
15
Community
8
Popularity
4
Documentation
15
expr-solver-lib
Maintenance
14
Quality
12
Community
8
Popularity
4
Documentation
10
Technical Details
| kalk | mathexpr | expr-solver-lib | |
|---|---|---|---|
| Version | 3.2.3 | 0.1.1 | 1.2.0 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 7 | 6 | 8 |
| Crate Size | 83KB | 27KB | 37KB |
| Features | 2 | 2 | 4 |
| Yanked % | 0.0% | 0.0% | 71.4% |
| Edition | 2018 | 2021 | 2024 |
| MSRV | — | 1.70 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •kalk leads with a health score of 66/100, but none of the options score above 80.
- •mathexpr is pre-1.0 — API may change.