lz4 vs zstd: What are the differences?

1. Compression Ratio: Zstandard (zstd) generally provides higher compression ratios compared to lz4. This means that zstd can achieve better file size reduction without compromising decompression speed.
2. Compression Speed: Lz4 is known for its extremely fast compression speed, outperforming zstd in this aspect. Lz4 is designed for scenarios where speed is crucial, making it ideal for real-time processing or applications where data needs to be compressed and decompressed quickly.
3. Memory Usage: Zstandard tends to consume more memory during compression and decompression processes compared to lz4. This can be a consideration in environments where memory efficiency is a critical factor.
4. Algorithm Complexity: Zstandard features a more complex compression algorithm compared to lz4, which contributes to its higher compression ratios but also requires more computational resources.
5. Compatibility: Lz4 is widely supported and integrated into various systems and platforms, making it a popular choice for applications requiring compatibility with different environments. On the other hand, zstd may require additional configuration or handling due to its newer adoption in some contexts.
6. Compression Level Options: Zstandard offers a wider range of compression levels and tuning options compared to lz4. This flexibility allows users to balance between compression ratio and speed based on their specific needs.

In Summary, when deciding between lz4 and zstd, consider factors such as compression ratio, speed, memory usage, algorithm complexity, compatibility, and compression level options based on the specific requirements of your application or system.