Decision Workspace
fmmap vs memmap2 vs memmap
Side-by-side comparison of Rust crates
55
fmmap
growingv0.4.0
A flexible and convenient high-level mmap for zero-copy file I/O.
66
memmap2
growingv0.9.10
Cross-platform Rust API for memory-mapped file IO
53
memmap
growingv0.7.0
Cross-platform Rust API for memory-mapped file IO
Core Metrics
| fmmap | memmap2 | memmap | |
|---|---|---|---|
| Health Score | 55 | 66 | 53 |
| Total Downloads | 213.1K | 212.7M | 31.5M |
| 30d Downloads | 16.2K | 16.0M | 1.1M |
| Dependents | 138 | 14.4K | 4.3K |
| Releases | 14 | 35 | 14 |
| Last Updated | 398d ago | 40d ago | 2745d ago |
| Age | 4y 3m | 6y 2m | 10y 7m |
Health Breakdown
fmmap
Maintenance
7
Quality
15
Community
12
Popularity
6
Documentation
15
memmap2
Maintenance
16
Quality
11
Community
16
Popularity
8
Documentation
15
memmap
Maintenance
5
Quality
15
Community
14
Popularity
8
Documentation
11
Technical Details
| fmmap | memmap2 | memmap | |
|---|---|---|---|
| Version | 0.4.0 | 0.9.10 | 0.7.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT/Apache-2.0 |
| Dependencies | 20 | 4 | 3 |
| Crate Size | 73KB | 35KB | 15KB |
| Features | 6 | 0 | 0 |
| Yanked % | 0.0% | 5.7% | 0.0% |
| Edition | 2021 | 2021 | — |
| MSRV | 1.65.0 | 1.63 | — |
| Owners | 1 | 4 | 2 |
Links
Quick Verdict
- •memmap2 leads with a health score of 66/100, but none of the options score above 80.
- •memmap2 is depended on by 14.4K crates — strongest ecosystem trust.
- •⚠ fmmap, memmap have not been updated in over a year.