tinybz2 — Minimal-memory bz2 for embedded targets

A no_std, zero-dependency bz2 compressor and decompressor designed to run on ESP32 and other memory-constrained microcontrollers.

Design goals

• ~110 KB peak RAM at block size 1 (100 KB blocks) for both compress and decompress — roughly 10× less than stock libbz2.
• Zero heap allocation — all working memory is caller-provided via fixed-size workspace structs.
• no_std + no alloc — suitable for bare-metal and RTOS targets.
• Streaming API — process data in chunks without buffering the entire input.

Memory budget at block size 1 (100 000 bytes)