Decision Workspace
fmmap vs memmapix vs memmap2
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.
53
memmapix
growingv0.9.0
A pure Rust library for cross-platform memory mapped IO, which replaces libc with rustix
63
memmap2
growingv0.9.10
Cross-platform Rust API for memory-mapped file IO
Core Metrics
| fmmap | memmapix | memmap2 | |
|---|---|---|---|
| Health Score | 55 | 53 | 63 |
| Total Downloads | 273.8K | 186.5K | 246.7M |
| 30d Downloads | 37.9K | 30.9K | 18.8M |
| Dependents | 144 | 45 | 17.7K |
| Releases | 14 | 13 | 35 |
| Last Updated | 457d ago | 33d ago | 99d ago |
| Age | 4y 5m | 3y 10m | 6y 4m |
Health Breakdown
fmmap
Maintenance
7
Quality
15
Community
12
Popularity
6
Documentation
15
memmapix
Maintenance
16
Quality
8
Community
8
Popularity
6
Documentation
15
memmap2
Maintenance
13
Quality
11
Community
16
Popularity
8
Documentation
15
Technical Details
| fmmap | memmapix | memmap2 | |
|---|---|---|---|
| Version | 0.4.0 | 0.9.0 | 0.9.10 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 20 | 6 | 4 |
| Crate Size | 73KB | 49KB | 35KB |
| Features | 6 | 0 | 0 |
| Yanked % | 0.0% | 46.2% | 5.7% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | 1.65.0 | 1.63.0 | 1.63 |
| Owners | 1 | 1 | 4 |
Links
Quick Verdict
- •memmap2 leads with a health score of 63/100, but none of the options score above 80.
- •memmap2 is depended on by 17.7K crates — strongest ecosystem trust.
- •⚠ fmmap has not been updated in over a year.