Decision Workspace
meval vs mathexpr vs expr-solver-lib
Side-by-side comparison of Rust crates
43
meval
growingv0.2.0
A simple math expression parser and evaluator.
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
| meval | mathexpr | expr-solver-lib | |
|---|---|---|---|
| Health Score | 43 | 51 | 48 |
| Total Downloads | 1.4M | 1.2K | 1.6K |
| 30d Downloads | 23.7K | 0 | 0 |
| Dependents | 611 | 3 | 7 |
| Releases | 10 | 2 | 7 |
| Last Updated | 2844d ago | 191d ago | 265d ago |
| Age | 10y | 6m | 8m |
Health Breakdown
meval
Maintenance
4
Quality
10
Community
11
Popularity
7
Documentation
11
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
| meval | mathexpr | expr-solver-lib | |
|---|---|---|---|
| Version | 0.2.0 | 0.1.1 | 1.2.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | Unlicense/MIT | MIT | MIT |
| Dependencies | 8 | 6 | 8 |
| Crate Size | 21KB | 27KB | 37KB |
| Features | 1 | 2 | 4 |
| Yanked % | 10.0% | 0.0% | 71.4% |
| Edition | — | 2021 | 2024 |
| MSRV | — | 1.70 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mathexpr leads with a health score of 51/100, but none of the options score above 80.
- •meval has the most downloads (1.4M), suggesting wider adoption.
- •meval is depended on by 611 crates — strongest ecosystem trust.
- •⚠ meval has not been updated in over a year.
- •meval, mathexpr are pre-1.0 — API may change.