Decision Workspace
memmap2 vs fmmap vs memmap
Side-by-side comparison of Rust crates
66
memmap2
growingv0.9.10
Cross-platform Rust API for memory-mapped file IO
55
fmmap
growingv0.4.0
A flexible and convenient high-level mmap for zero-copy file I/O.
53
memmap
growingv0.7.0
Cross-platform Rust API for memory-mapped file IO
Core Metrics
| memmap2 | fmmap | memmap | |
|---|---|---|---|
| Health Score | 66 | 55 | 53 |
| Total Downloads | 212.7M | 213.1K | 31.5M |
| 30d Downloads | 16.0M | 16.2K | 1.1M |
| Dependents | 14.4K | 138 | 4.3K |
| Releases | 35 | 14 | 14 |
| Last Updated | 40d ago | 398d ago | 2745d ago |
| Age | 6y 2m | 4y 3m | 10y 7m |
Health Breakdown
memmap2
Maintenance
16
Quality
11
Community
16
Popularity
8
Documentation
15
fmmap
Maintenance
7
Quality
15
Community
12
Popularity
6
Documentation
15
memmap
Maintenance
5
Quality
15
Community
14
Popularity
8
Documentation
11
Technical Details
| memmap2 | fmmap | memmap | |
|---|---|---|---|
| Version | 0.9.10 | 0.4.0 | 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 | 4 | 20 | 3 |
| Crate Size | 35KB | 73KB | 15KB |
| Features | 0 | 6 | 0 |
| Yanked % | 5.7% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | — |
| MSRV | 1.63 | 1.65.0 | — |
| Owners | 4 | 1 | 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.