Decision Workspace
fastexpr-rs vs boa_engine vs Boa
Side-by-side comparison of Rust crates
44
fastexpr-rs
growingv1.0.2
A tiny, fast Javascript expression parser
63
boa_engine
growingv0.21.0
Boa is a Javascript lexer, parser and compiler written in Rust. Currently, it has support for some of the language.
43
Boa
growingv0.13.1
DEPRECATED. Use the boa_engine crate instead.
Core Metrics
| fastexpr-rs | boa_engine | Boa | |
|---|---|---|---|
| Health Score | 44 | 63 | 43 |
| Total Downloads | 3.4K | 2.4M | 72.1K |
| 30d Downloads | 5 | 267.5K | 323 |
| Dependents | 0 | 418 | 11 |
| Releases | 3 | 11 | 23 |
| Last Updated | 605d ago | 157d ago | 1279d ago |
| Age | 1y 8m | 4y | 7y 6m |
Health Breakdown
fastexpr-rs
Maintenance
5
Quality
19
Community
6
Popularity
4
Documentation
10
boa_engine
Maintenance
12
Quality
13
Community
18
Popularity
8
Documentation
12
Boa
Maintenance
6
Quality
13
Community
9
Popularity
6
Documentation
9
Technical Details
| fastexpr-rs | boa_engine | Boa | |
|---|---|---|---|
| Version | 1.0.2 | 0.21.0 | 0.13.1 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | MIT | Unlicense OR MIT | Unlicense/MIT |
| Dependencies | 3 | 74 | 23 |
| Crate Size | 17KB | 837KB | 372KB |
| Features | 0 | 17 | 4 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2018 |
| MSRV | — | 1.88.0 | — |
| Owners | 1 | 3 (team) | 1 |
Links
Quick Verdict
- •boa_engine leads with a health score of 63/100, but none of the options score above 80.
- •boa_engine is depended on by 418 crates — strongest ecosystem trust.
- •⚠ fastexpr-rs, Boa have not been updated in over a year.
- •boa_engine, Boa are pre-1.0 — API may change.