Understanding Zlib: A Beginner’s Guide to Compression in C and Python

Advanced Zlib Techniques: Streaming, Custom Compression Levels, and Optimizations

Streaming

• Use the streaming API (deflateInit/deflate/inflate or language wrappers: Python zlib.compressobj/decompressobj, Node.js zlib streams) to process large or real-time data without loading everything into memory.
• Choose appropriate buffer/chunk sizes (typical 16KB–64KB). Larger chunks reduce syscall/overhead; smaller chunks reduce latency.
• Use flush modes to control latency and block boundaries:
  • Z_NO_FLUSH — normal streaming.
  • Z_SYNC_FLUSH — flush to byte