Struct CompressionDictionary 

pub struct CompressionDictionary { /* private fields */ }

A trained compression dictionary for Zstd.

The dictionary contains common patterns extracted from sample data, enabling much better compression for small, repetitive payloads.

Implementations

impl CompressionDictionary

pub fn train(samples: &[Vec<u8>], dict_size: usize) -> Result<Self>

Train a new dictionary from sample data.

Arguments

• samples - Representative sample payloads
• dict_size - Target dictionary size in bytes (default: 32KB)

Returns

A trained dictionary, or an error if training fails.

Example

let samples: Vec<Vec<u8>> = payloads.clone();
let dict = CompressionDictionary::train(&samples, 32 * 1024)?;

pub fn from_bytes(data: Vec<u8>) -> Self

Create a dictionary from raw bytes (for loading from storage).

pub fn as_bytes(&self) -> &[u8]

Get the raw dictionary bytes.

pub fn size(&self) -> usize

Get the dictionary size.

pub fn id(&self) -> u32

Get the dictionary ID.

Trait Implementations

impl Clone for CompressionDictionary

fn clone(&self) -> CompressionDictionary

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompressionDictionary

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.