Struct MegamorphicCache 

pub struct MegamorphicCache { /* private fields */ }

Implementations

impl MegamorphicCache

pub fn new() -> Self

Creates a new cache with all entries invalid.

pub fn hash_key(schema_id: u64, field_name: &str) -> u64

Combines a schema_id and field name into a hash key.

Uses FNV-1a-inspired mixing: fold the field name bytes into the schema_id with multiply-xor rounds.

pub fn probe(&self, key: u64) -> Option<(u16, u16)>

Probes the cache for a matching entry. Returns Some((field_idx, field_type_tag)) on hit, None on miss.

pub fn insert(&mut self, key: u64, field_idx: u16, field_type_tag: u16)

Inserts an entry at the direct-mapped position (key % CACHE_SIZE). Overwrites any existing entry at that index.

pub fn invalidate_all(&mut self)

Marks all entries as invalid.

pub fn hit_rate(&self) -> f64

Returns the ratio of valid entries (diagnostic).

Trait Implementations

impl Default for MegamorphicCache

fn default() -> Self

Returns the “default value” for a type.