A Deep Dive into Compression Algorithms: From DEFLATE to ZSTD

2025-01-23

While building MonKafka, a Kafka Broker implementation, the author delved into the four compression algorithms supported by Kafka: GZIP, Snappy, LZ4, and ZSTD. The article provides a detailed explanation of these algorithms, covering lossless and lossy compression, run-length encoding, Lempel-Ziv algorithms, Huffman coding, and a deep dive into the DEFLATE algorithm's implementation, including LZ77, Huffman coding, and hash tables. Furthermore, it compares the performance of Snappy, LZ4, and ZSTD, and briefly introduces arithmetic coding and FSE. The author concludes by summarizing the core concept of compression algorithms: removing data redundancy, reducing entropy, and extracting information.