Decision Workspace
xxcalc vs kalk vs expr-solver-lib
Side-by-side comparison of Rust crates
38
xxcalc
growingv0.2.1
Embeddable or standalone robust floating-point polynomial calculator
57
kalk
growingv3.2.2
A math evaluator library that supports user-defined functions, variables and units, and can handle fairly ambiguous syntax.
49
expr-solver-lib
experimentalv1.2.0
Mathematical expression evaluator with bytecode compilation and configurable numeric precision (f64 or 128-bit Decimal)
Core Metrics
| xxcalc | kalk | expr-solver-lib | |
|---|---|---|---|
| Health Score | 38 | 57 | 49 |
| Total Downloads | 12.9K | 67.4K | 1.3K |
| 30d Downloads | 36 | 276 | 29 |
| Dependents | 0 | 44 | 7 |
| Releases | 4 | 45 | 7 |
| Last Updated | 3399d ago | 203d ago | 157d ago |
| Age | 9y 3m | 5y 9m | 5m |
Health Breakdown
xxcalc
Maintenance
8
Quality
11
Community
3
Popularity
5
Documentation
11
kalk
Maintenance
11
Quality
20
Community
11
Popularity
6
Documentation
9
expr-solver-lib
Maintenance
16
Quality
11
Community
8
Popularity
4
Documentation
10
Technical Details
| xxcalc | kalk | expr-solver-lib | |
|---|---|---|---|
| Version | 0.2.1 | 3.2.2 | 1.2.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 2 | 6 | 8 |
| Crate Size | 30KB | 78KB | 37KB |
| Features | 1 | 1 | 4 |
| Yanked % | 25.0% | 0.0% | 71.4% |
| Edition | — | 2018 | 2024 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •kalk leads with a health score of 57/100, but none of the options score above 80.
- •⚠ xxcalc has not been updated in over a year.
- •xxcalc is pre-1.0 — API may change.