A sparse, compressed bitmap index in C. Is it better than Roaring Bitmaps?
Summary
This article introduces sparsemap, a C99 sparse, compressed bitmap library, and compares it to Roaring Bitmaps. It highlights impressive compression (best case 2048 bits in 8 bytes) and discusses a production-grade hardening release (v2.3.0) with fuzzing-driven bug fixes, cross-architecture CI, and explicit security improvements.