Decision Workspace
mmap-guard vs memmap2 vs fmmap
Side-by-side comparison of Rust crates
56
mmap-guard
experimentalv0.2.2
Safe, guarded memory-mapped file I/O for Rust
67
memmap2
growingv0.9.11
Cross-platform Rust API for memory-mapped file IO
64
fmmap
growingv0.5.0
A flexible and convenient high-level mmap for zero-copy file I/O.
Core Metrics
| mmap-guard | memmap2 | fmmap | |
|---|---|---|---|
| Health Score | 56 | 67 | 64 |
| Total Downloads | 2.3K | 283.1M | 309.5K |
| 30d Downloads | 890 | 14.3M | 10.9K |
| Dependents | 0 | 21.5K | 147 |
| Releases | 4 | 36 | 15 |
| Last Updated | 9d ago | 21d ago | 19d ago |
| Age | 4m | 6y 5m | 4y 7m |
Health Breakdown
mmap-guard
Maintenance
17
Quality
14
Community
6
Popularity
4
Documentation
15
memmap2
Maintenance
17
Quality
11
Community
16
Popularity
8
Documentation
15
fmmap
Maintenance
17
Quality
13
Community
12
Popularity
7
Documentation
15
Technical Details
| mmap-guard | memmap2 | fmmap | |
|---|---|---|---|
| Version | 0.2.2 | 0.9.11 | 0.5.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 4 | 4 | 18 |
| Crate Size | 33KB | 35KB | 126KB |
| Features | 1 | 0 | 4 |
| Yanked % | 0.0% | 5.6% | 0.0% |
| Edition | 2024 | 2021 | 2021 |
| MSRV | 1.85 | 1.65 | 1.81.0 |
| Owners | 1 | 4 | 1 |
Links
Quick Verdict
- •memmap2 leads with a health score of 67/100, but none of the options score above 80.
- •memmap2 is depended on by 21.5K crates — strongest ecosystem trust.