101arrowz/fflate

fflate is a pure JavaScript compression and decompression library that delivers high performance in an 8 kilobyte package.

The tool solves the problem of needing fast, lightweight compression in JavaScript environments where native libraries are unavailable or impractical. It implements DEFLATE, GZIP, and Zlib formats with a focus on speed and bundle size. The library achieves this through optimized algorithms that outperform comparable implementations while maintaining compatibility with standard compression formats, allowing data compressed by fflate to be decompressed by other tools and vice versa.

Developers should choose this tool when bundle size matters alongside performance, particularly in browser environments or resource-constrained contexts. It suits projects requiring compression, decompression, or ZIP file handling in pure JavaScript. The README explicitly compares fflate to pako, tiny-inflate, and UZIP.js, showing that fflate offers decompression up to 25 percent faster than pako and UZIP.js, compression up to 50 percent faster than pako, and a smaller base bundle size than pako while supporting features like streaming, multi-threaded asynchronous compression, dictionary support, and files up to 4 gigabytes that competing libraries lack. For inflate-only use cases, the tool can be reduced to 3 kilobytes.

The project shows consistent maintenance with regular updates addressing edge cases and performance improvements. Development activity demonstrates attention to correctness, with fixes for error handling in edge cases and improvements to streaming behavior. The codebase maintains high test coverage to ensure reliability across different compression scenarios and formats.