Struct BitPacker4x 

pub struct BitPacker4x(/* private fields */);

BitPacker4x packs integers in groups of 4. This gives an opportunity to leverage SSE3 instructions to encode and decode the stream.

One block must contain 128 integers.

Trait Implementations

impl BitPacker for BitPacker4x

const BLOCK_LEN: usize = BLOCK_LEN

Number of u32 values in one physical block.

fn new() -> Self

Select the best supported implementation for the current CPU.

fn compress( &self, decompressed: &[u32], compressed: &mut [u8], num_bits: u8, ) -> usize

Compress one full block of raw values into compressed.

fn compress_sorted( &self, initial: u32, decompressed: &[u32], compressed: &mut [u8], num_bits: u8, ) -> usize

Delta-compress one full non-decreasing block into compressed.

fn compress_strictly_sorted( &self, initial: Option<u32>, decompressed: &[u32], compressed: &mut [u8], num_bits: u8, ) -> usize

Delta-compress one full strictly increasing block into compressed.

fn decompress( &self, compressed: &[u8], decompressed: &mut [u32], num_bits: u8, ) -> usize

Decompress one raw block into decompressed.

fn decompress_strictly_sorted( &self, initial: Option<u32>, compressed: &[u8], decompressed: &mut [u32], num_bits: u8, ) -> usize

Decompress one delta-compressed strictly increasing block.

fn decompress_sorted( &self, initial: u32, compressed: &[u8], decompressed: &mut [u32], num_bits: u8, ) -> usize

Decompress one delta-compressed non-decreasing block.

fn num_bits(&self, decompressed: &[u32]) -> u8

Return the minimum bit width needed to represent a full raw block.

fn num_bits_sorted(&self, initial: u32, decompressed: &[u32]) -> u8

Return the minimum bit width needed to represent deltas in a full block.

fn num_bits_strictly_sorted( &self, initial: Option<u32>, decompressed: &[u32], ) -> u8

Return the minimum bit width needed to represent strict deltas in a full block.

fn compressed_block_size(num_bits: u8) -> usize

Return the byte size of one compressed block at num_bits.

impl Clone for BitPacker4x

fn clone(&self) -> BitPacker4x

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BitPacker4x