Enum CompressionMode 

pub enum CompressionMode {
    None,
    Lz4,
    Zstd {
        level: i32,
    },
}

Per-object compression strategy.

Each KnowledgeObject can be independently compressed with a different algorithm and level. The choice depends on the object’s characteristics:

• LZ4: ~3 GB/s decode, low CPU. Best for hot/frequently-accessed objects.
• ZSTD: ~1 GB/s decode, better ratios. Best for cold/archival objects.
• None: Zero overhead. Use for tiny objects where compression adds bytes.

Variants

None

No compression — raw JSON bytes.

Lz4

LZ4 block compression — fast decode, moderate ratio.

Zstd

ZSTD compression with configurable level (1–22, default 3).

Fields

level: i32

Implementations

impl CompressionMode

pub fn tag(&self) -> u8

1-byte tag written to the wire format header.

pub fn from_tag(tag: u8) -> Option<Self>

Construct from wire tag (decompression side doesn’t need level).

pub fn zstd() -> Self

Default ZSTD mode (level 3 — good balance of speed and ratio).

pub fn zstd_high() -> Self

High-compression ZSTD (level 9 — archival).

Trait Implementations

impl Clone for CompressionMode

fn clone(&self) -> CompressionMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompressionMode

impl Debug for CompressionMode

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

Formats the value using the given formatter.

impl Default for CompressionMode

fn default() -> Self

Returns the “default value” for a type.

impl Eq for CompressionMode

impl PartialEq for CompressionMode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CompressionMode