Enum EvictionPolicy 

pub enum EvictionPolicy {
    LRU,
    LFU,
    ARC,
    Clock,
    Fixed,
}

Eviction policy selection (configurable per deployment)

Policy Recommendations

• LRU: Sequential inference, time-series models
• LFU: Random access, sparse models
• ARC: Mixed workloads, production deployments
• Clock: Embedded systems with limited CPU
• Fixed: Deterministic embedded, NASA Level A

Variants

LRU

Least Recently Used (temporal locality) Best for: Sequential inference, time-series models

LFU

Least Frequently Used (frequency locality) Best for: Random access, sparse models

ARC

Adaptive Replacement Cache [Megiddo & Modha 2003] Best for: Mixed workloads, production deployments

Clock

Clock algorithm (efficient approximation of LRU) Best for: Embedded systems with limited CPU

Fixed

No eviction (fixed memory pool) Best for: Deterministic embedded, NASA Level A

Implementations

impl EvictionPolicy

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

Get human-readable description

pub const fn supports_eviction(&self) -> bool

Check if this policy supports eviction

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

Get recommended use case

Trait Implementations

impl Clone for EvictionPolicy

fn clone(&self) -> EvictionPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvictionPolicy

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

Formats the value using the given formatter.

impl Default for EvictionPolicy

fn default() -> EvictionPolicy

Returns the “default value” for a type.

impl PartialEq for EvictionPolicy

fn eq(&self, other: &EvictionPolicy) -> 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 Copy for EvictionPolicy

impl Eq for EvictionPolicy

impl StructuralPartialEq for EvictionPolicy