* COMPAX (COMPressed Adaptive indeX )
**研究论文：
# Matthias Vallentin, Vern Paxson, and Robin Sommer. "VAST: a unified platform for interactive network forensics." NSDI 2016.
# Gonzalo Navarro and Eliana Providel. “Fast, Small, Simple Rank/Select on Bitmaps.” SEA 2013.
== 混合结构（Hybrid） ==