Decision Workspace
formulac vs meval vs exprtk_rs
Side-by-side comparison of Rust crates
42
formulac
experimentalv0.6.0
A complex-number and extensible function supported math expression parser for Rust
42
meval
growingv0.2.0
A simple math expression parser and evaluator.
35
exprtk_rs
growingv0.1.0
Rust bindings to the ExprTk C++ library (http://www.partow.net/programming/exprtk)
Core Metrics
| formulac | meval | exprtk_rs | |
|---|---|---|---|
| Health Score | 42 | 42 | 35 |
| Total Downloads | 2.3K | 1.2M | 13.5K |
| 30d Downloads | 8 | 32.6K | 8 |
| Dependents | 0 | 535 | 0 |
| Releases | 10 | 10 | 8 |
| Last Updated | 61d ago | 2736d ago | 1870d ago |
| Age | 7m | 9y 8m | 8y 2m |
Health Breakdown
formulac
Maintenance
15
Quality
7
Community
6
Popularity
4
Documentation
10
meval
Maintenance
4
Quality
10
Community
10
Popularity
7
Documentation
11
exprtk_rs
Maintenance
3
Quality
12
Community
3
Popularity
5
Documentation
12
Technical Details
| formulac | meval | exprtk_rs | |
|---|---|---|---|
| Version | 0.6.0 | 0.2.0 | 0.1.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | Unlicense/MIT | MIT |
| Dependencies | 6 | 8 | 4 |
| Crate Size | 44KB | 21KB | 16KB |
| Features | 0 | 1 | 12 |
| Yanked % | 40.0% | 10.0% | 50.0% |
| Edition | 2024 | — | 2018 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •formulac leads with a health score of 42/100, but none of the options score above 80.
- •meval has the most downloads (1.2M), suggesting wider adoption.
- •meval is depended on by 535 crates — strongest ecosystem trust.
- •⚠ meval, exprtk_rs have not been updated in over a year.