2 unstable releases
0.2.0 | Aug 13, 2023 |
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0.1.0 | Aug 6, 2023 |
#690 in Compression
19KB
289 lines
Wrappers of bitpacking with extra pack formats
This crate wraps crate bitpacking
. It contains variant bitpacking formats, inspired by BPCells.
See also this article
Bitpacking format
The vanilla format
Same as behaviors in vanilla compression of bitpacking.
m1
format
Same as behaviors in vanilla compression of bitpacking, but with 1 subtracted from each value prior to compression.
d1
format
Same as behaviors in delta compression of bitpacking, which transforms the original input into the difference between consecutive values prior to bitpacking. Therefore, the original input block must be sorted.
d1z
format
Similar to d1
format but with zigzag encoding applied after difference encoding, where $zigzag(x) = 2x$ if $x > 0$, while $x < 0$, $zigzag(x) = -2x - 1$. This is best for lists of close but not fully sorted runs of integers.
Dependencies
~150KB