GitHub - lemire/javaewah: A compressed alternative to the Java BitSet class

This is a word-aligned compressed variant of the Java Bitset class. We provide both a 64-bit and a 32-bit RLE-like compression scheme. It can be used to implement bitmap indexes. The EWAH format it relies upon is used in the git implementation that runs GitHub. The goal of word-aligned compression is not to achieve the best compression, but rather to improve query processing time. Hence, we try to

[msykt]

さっきのSparse Bitmapの人、BitSet拡張も書いてる。こっちの方が面白いかな