Decision Workspace
memmap3 vs fmmap vs memmapix
Side-by-side comparison of Rust crates
41
memmap3
experimentalv0.1.0
Safe, zero-copy memory-mapped I/O. Drop-in replacement for memmap2 with persistent structs and zero unsafe in user code.
55
fmmap
growingv0.4.0
A flexible and convenient high-level mmap for zero-copy file I/O.
42
memmapix
growingv0.7.6
No libc, pure Rust cross-platform Rust API for memory-mapped file IO
Core Metrics
| memmap3 | fmmap | memmapix | |
|---|---|---|---|
| Health Score | 41 | 55 | 42 |
| Total Downloads | 1.7K | 213.1K | 147.1K |
| 30d Downloads | 350 | 15.7K | 3.7K |
| Dependents | 8 | 138 | 45 |
| Releases | 1 | 14 | 11 |
| Last Updated | 181d ago | 398d ago | 921d ago |
| Age | 6m | 4y 3m | 3y 8m |
Health Breakdown
memmap3
Maintenance
5
Quality
14
Community
6
Popularity
4
Documentation
12
fmmap
Maintenance
7
Quality
15
Community
12
Popularity
6
Documentation
15
memmapix
Maintenance
4
Quality
9
Community
11
Popularity
6
Documentation
12
Technical Details
| memmap3 | fmmap | memmapix | |
|---|---|---|---|
| Version | 0.1.0 | 0.4.0 | 0.7.6 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT/Apache-2.0 |
| Dependencies | 9 | 20 | 3 |
| Crate Size | 97KB | 73KB | 30KB |
| Features | 2 | 6 | 0 |
| Yanked % | 0.0% | 0.0% | 54.5% |
| Edition | 2024 | 2021 | 2018 |
| MSRV | 1.89 | 1.65.0 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •fmmap leads with a health score of 55/100, but none of the options score above 80.
- •fmmap is depended on by 138 crates — strongest ecosystem trust.
- •⚠ fmmap, memmapix have not been updated in over a year.