crc32c-hw version 0.1.2

CRC32C implementation with support for CPU-specific acceleration instructions (SSE 4.2) and software fallback.

Usage

To use crc32c-hw, add this to your Cargo.toml:

toml [dependencies] crc32c-hw = "0.1.2"

Example

```rust extern crate crc32c_hw;

let mut crc = 0; crc = crc32chw::update(crc, b"123"); crc = crc32chw::update(crc, b"456"); crc = crc32chw::update(crc, b"789"); asserteq!(crc, 0xe3069283);

asserteq!(crc32chw::compute(b"123456789"), 0xe3069283); ```

The easiest way to build binaries with CPU-specific instructions support is via environment variable:

bash RUSTFLAGS="-C target_cpu=native" cargo build --release

Performance

cargo bench on MacBook Pro Intel Core i5 2,7 GHz results in ~23.0 GBps (hardware) / ~2.5 GBps (software) throughput.

bash test crc32c_hw::tests::crc_0_065_000 ... bench: 2,808 ns/iter (+/- 398) test crc32c_hw::tests::crc_1_000_000 ... bench: 41,915 ns/iter (+/- 6,100) test crc32c_sw::tests::crc_0_065_000 ... bench: 25,686 ns/iter (+/- 19,423) test crc32c_sw::tests::crc_1_000_000 ... bench: 384,286 ns/iter (+/- 53,529)

Licence

Distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, and LICENSE-MIT for details.