Enum DataCompression 

pub enum DataCompression {
    None,
    Zstd {
        level: u8,
    },
    DeltaZstd {
        level: u8,
    },
    QuantizedEntropy {
        bits: u8,
    },
    Sparse {
        threshold: u32,
    },
}

Data compression strategy (spec §4.2)

Selects optimal compression based on data characteristics:

• None: Raw f32 values, zero latency
• Zstd: General purpose, 2-10x ratio
• DeltaZstd: Time series/sorted data, 5-20x ratio
• QuantizedEntropy: ML-specific, 4-8x with minimal accuracy loss
• Sparse: Sparse features, ratio proportional to sparsity

Variants

None

No compression (raw f32 values)

Zstd

Zstd compression (general purpose) Ratio: 2-10x, Speed: 500 MB/s decompress

Fields

level: u8

Compression level (1-22)

DeltaZstd

Delta encoding + Zstd (time series, sorted data) Ratio: 5-20x for sequential data

Fields

level: u8

Compression level (1-22)

QuantizedEntropy

Quantization + entropy coding (ML-specific) Ratio: 4-8x with minimal accuracy loss

Fields

bits: u8

Quantization bits (4, 8, 16)

Sparse

Sparse representation (for sparse features) Ratio: proportional to sparsity

Fields

threshold: u32

Threshold below which values are treated as zero

Implementations

impl DataCompression

pub const fn zstd() -> DataCompression

Create Zstd compression with default level

pub const fn zstd_level(level: u8) -> DataCompression

Create Zstd compression with custom level

pub const fn delta_zstd() -> DataCompression

Create delta+Zstd compression

pub const fn quantized(bits: u8) -> DataCompression

Create quantized entropy compression

pub fn sparse(threshold: f32) -> DataCompression

Create sparse compression with threshold

pub const fn name(&self) -> &'static str

Human-readable name

pub const fn estimated_ratio(&self) -> f32

Estimated compression ratio (typical)

Trait Implementations

impl Clone for DataCompression

fn clone(&self) -> DataCompression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DataCompression

impl Debug for DataCompression

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

Formats the value using the given formatter.

impl Default for DataCompression

fn default() -> DataCompression

Returns the “default value” for a type.

impl Eq for DataCompression

impl PartialEq for DataCompression

fn eq(&self, other: &DataCompression) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DataCompression