lz4_flex

Fastest LZ4 implementation in Rust. Originally based on redox-os' lz4 compression, but now a complete rewrite. The results in the table are from a benchmark in this project (66Kb JSON).

| Compressor | Compression | Decompression | |------------------|-------------|---------------| | lz4flex unsafe | 711 MiB/s | 3733 MiB/s | | lz4flex safe | 628 MiB/s | 1433 MiB/s | | lz4cpp | 914 MiB/s | 3793 MiB/s | | lz4fear | 443 MiB/s | 836 MiB/s |

Features

Very good logo
LZ4 Block format
High performance
0,5s clean release build time
Feature flags to configure safe/unsafe code usage
no-std support (thanks @coolreader18)
32-bit support

Usage:

Compression and decompression uses no usafe via the default feature flags "safe-encode" and "safe-decode". If you need more performance you can disable them (e.g. with no-default-features).

Safe: lz4_flex = { version = "0.7.0" }

Performance: lz4_flex = { version = "0.7.0", default-features = false }

```rust use lz4flex::{compressprependsize, decompresssize_prepended};

fn main(){ let input: &[u8] = b"Hello people, what's up?"; let compressed = compressprependsize(input); let uncompressed = decompresssizeprepended(&compressed).unwrap(); assert_eq!(input, uncompressed); } ```

Benchmarks

The benchmark is run with criterion, the test files are in the benches folder.

Currently 3 implementations are compared, this one, the redox-version, lz-fear and the c++ version via rust bindings. The lz4-flex version is tested with the feature flags safe-decode and safe-encode switched on and off.

lz4redoxrust: https://crates.io/crates/lz4-compress
lz4_cpp: https://crates.io/crates/lz4
lz-fear: https://github.com/main--/rust-lz-fear