This project implements a file comparison utility similar to Linux/macOS cmp, but using SIMD instructions from Rust's standard library to accelerate the comparison.

• Rust nightly (needed for std::simd)
• Standard build tools

• SIMD-accelerated file comparison for better performance using Rust's std::simd
• Command-line interface similar to the standard cmp utility
• Comprehensive benchmarks to demonstrate performance gains
• Cross-platform support (Windows, Linux, macOS)

cargo run -- file1 file2 # Compare two files cargo run -- file1 file2 -s # Silent mode - only return exit code

You can download pre-built binaries for Windows, Linux, and macOS from the Releases page.

# Clone the repository git clone https://github.com/abbychau/simd-cmp.git cd simd-cmp # Build with cargo cargo build --release # The binary will be available at target/release/simd-cmp

The SIMD-accelerated file comparison is significantly faster than the standard cmp utility, especially for larger files. Benchmarks show a performance improvement of roughly 4x for files larger than 1MB.

~/simd-cmp/target/release > hyperfine 'cmp a2.txt b2.txt' --warmup 1 Benchmark 1: cmp a2.txt b2.txt Time (mean ± σ): 1.969 s ± 0.024 s [User: 1.779 s, System: 0.157 s] Range (min … max): 1.945 s … 2.021 s 10 runs ~/simd-cmp/target/release > hyperfine './simd-cmp a2.txt b2.txt' --warmup 1 Benchmark 1: ./simd-cmp a2.txt b2.txt Time (mean ± σ): 542.2 ms ± 51.9 ms [User: 105.5 ms, System: 403.4 ms] Range (min … max): 507.1 ms … 682.4 ms 10 runs ~/simd-cmp/target/release > hyperfine 'cmp a.txt b.txt' --warmup 1 Benchmark 1: cmp a.txt b.txt Time (mean ± σ): 668.5 ms ± 10.8 ms [User: 592.1 ms, System: 53.3 ms] Range (min … max): 656.5 ms … 685.6 ms 10 runs ~/simd-cmp/target/release > hyperfine './simd-cmp a.txt b.txt' --warmup 1 Benchmark 1: ./simd-cmp a.txt b.txt Time (mean ± σ): 179.6 ms ± 3.1 ms [User: 35.8 ms, System: 133.2 ms] Range (min … max): 175.9 ms … 186.2 ms 15 runs 

This project uses GitHub Actions for continuous integration and deployment. The workflow automatically builds and tests the application on Windows, Linux, and macOS. When a new tag is pushed, it creates a release with pre-built binaries for all supported platforms.

To create a new release:

1. Tag the commit you want to release: git tag -a v1.0.0 -m "Release v1.0.0"
2. Push the tag: git push origin v1.0.0
3. GitHub Actions will automatically build the binaries and create a release